1、优质、高产杂交中稻新品种
金优554
特征特性:该品种全生育期与对照汕优63相当。株高适中,株叶形态好,剑叶直立,耐肥抗倒,分蘖力强,生长旺盛,熟期转色好,脱粒性好,结实率80%左右。
产量表现:贵州两年区试凭据亩产分别比对照汕优63增产11.3%、10.3%,两年平均亩产比对照增产10.9%。
适宜区域:在种植汕优63的区域作一季中稻种植。
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2、chuanzhong
Sichuan Chuan Zhong seed limited liability company
Introduction
Sichuan Chuan Zhong seed Co.ltd.is the branch of the rice and sorghum research institute of Sichuan agricultural scientific academy. (RSRISAAS).As the subcenter of China rice improvement center,it provides technical support for our company.We have much experience in the breeding, production and sale of seeds.We have more than 20 kinds of varieties of hybrid seed,which adapt to various ecosystem,growing period ,cropping systems and the demands for consumption.We have about 20000 mu paddy rice base ,which yield more than 5million kg hybrid paddy rice in kinds in Sichuan provice of China ,
the rice and sorghum research institute of Sichuan agricultural scientific academy was built in 1937.it is the Luzhou subcenter of national rice improvement center,the propagating nursery of nation super rice, the key institute of paddy rice breeding in Shichuan province of China, the experiment base of paddy rice of the southern part of China.Its synthesis strength in the research of paddy rice in the fifth of China. It gets two Nation Science Convention Prize. one Nation Technical Innovation Prize. one Nation Science Advancement Prize. one Nation Patent Prize and 87 other important prizes,and it has breeded more than 100 varieies.
There are eight main depatments which are research centre of paddy rice,financial office,manufacture board,market board,verify board,administration and Chdu work office subordinate to our company .Our prime staff come form the RSRISAAS with great technology strength.
We keep to developing our quality , service and innovation,provide high qulity production. The brand “倍丰”and“川种”have built the wonderful image in people’s heart.Our products have assessed the“the best decade brands in the seed industry of China” “the secure products in seed market of China” “the excellence enterprise of Shichuan province of China in 2004” and“AAA grades enterporise”endued by agriculture development bank.
We will try our best to do better.
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3、Chuanxiang №.8
New variety of hybrid rice with fragrant high-yield
and good disease resistance
Chuanxiang №.8
The variety has been registered and released to commercial production in Sichuan of China and enterde the regional yield trials test of China in the same year. It is through the introduction test of Henan in 2006.It is possible to be certified by the National Crop Variety Release Committee.It acquired the “Dao Xiang Bei”which endued to the with good quality.
Yiled performance:It’s yiede is 5.1% higer than that of check Shanyou 63 in the regional test in Sichuan province in 2003.It’s average yielde is 571.5kg in 5 places and 6.9% higher than check Shanyou 63 in the yield trials test in 2003.It’s yielde is more than 8% higer than that of check Shanyou63 in the tegional test of middle-down yangtze valley in 2004 and 4% higer than check Ⅱ you 838 in the test in 2005.It’s output 600-650kg,the peak output is higher than 900kg.
Characters:It has good grain qulity with all of its quality traits meeting the standards of three class of fine quality rice issued by the Ministry of Agriculture of China.
The variety is more than 3-4 days than Shanyou63,with great setting percentage,thousand-kernel weight and great tillering ability.It’s highly resistant to rice blast.It’s a good variety in China.
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4、K you 404
High-jield dependable early-rice of hybrid
K you 404
This variety is early rice of three-line hybrid combination.the period of duration is 116 days in Jiangxi,Hunan,Zhejiang province and the middle of northern Fujian province of China.The variety, with the right plant type and dark green blade color has great ability of enduring cold in seeding stage.Its plant height is about 91cm.Both its setting percentage and thousand-kernel weight are high.its leaf blast is in 0-7level and the bacterial leaf spot is in 3-9 level.
The jield performance: Its average yielde is 10.1% and 23.4% higer than that of check Zhe733 and Bo Youzhan19 in the regional yield trials for quality early indica of late maturing variety.In the continuous test,it yilded an average of 10.1% higher than that of the check Zhe733.It’s characterized with both high yield and wild adaptability.
Adaptive trait: The variety is suitable to be grown in the area in which the Shanyou402,Jinyou402 and Kyou402 planted.It’s also well planted in Sichuan,Chongqing, the mountainous of Guizhou province area.
At present,the species has planted shree years in Spain,with good performace.
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5、K you 77
The early-maturing of late rice of hybrid paddy rice combination
K you 77
The variety is certified by Nation Crop Variety Release Committee,awarding the nation invention prize.
The variety is the early-maturing of the three-line late indica hybrid rice. The growth period of the species is 1-2 days more than Shanyou64.It’s,hight-yield and wide-adaptability. The length of plant is 90cm, iand the pannicle length is 22-24cm , the grain number is 125-130,the setting percentage is 85% and the thousand-kernel weight is 28-29g. It’s production is 5-10% highter than the other varieties in the same type which are planted in China.it adapts to plant in the area which the rice blast and the bacterial leaf spot is not common as the medium rice or late rice.It’s also suitable to be grown in Sichan,Yunan,Guizhou(the altitude is 1000-1300m) etc, as medium rice.
At present,the species has planted shree years in Spain,with good performace,it will be introduce planted more widely.
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6、K you 17
New medium variety of Hight-yield and wide-Adaptability hybrid paddy rice
K you 17
It is the protected variety of Rice and sorghum research institute of
China Sichuan agricultural scientific academy.it is certified by Nation
Crop Variety Release Committee in 1999.it has awarded the nation
invention prize and nation technology prize.
The growth period of the variety which is planted as mid-rice is more than 5-7days than Shanyou63 with the 600-650 Kg average output per mu and as late rice with 550-600 Kg yield.It has high setting percentage ,thousand-kernel weight and great tillering ability.especially it also has the great ability of enduring cold in seeding stage and heat resistance in heading stage. In two years(1995&1996) of China nation reginal test for paddy rice ,the variety has gotten the peak output(581.92 Kg) and the best increasment(24.49%) compared the other varieties.it’s also gotten the best yield per day and hightest percengtage of output increment.
In resent years,it has planted widely in provinve of Sichuan,
Hunan,Anhui and Hena province of China,etc.
It is adapt to plant in the yangtze valley as the medium variety or
the late rice, it is the preferential planted as the consecutive crop in vegetable-growing area.
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7、China super rice ⅡYou 602
China super rice ⅡYou 602
The variety is the three-line paddy rice dervived from crosses amongⅡ-32A and Luhui 602 restorer line.it is certified by Sichuan province Crop Variety Release Committee in 2002 and certified by the National Crop Variety Release Committee in 2004 with the named “super rice”of China. .it was one of the fifty leading varieties of paddy rice of China in 2005.it is one of the good and security varieties in China.
1.yield performance: It is the best variety with the yield 8.61% higer than that of check Shanyou63 in the regional test in Shichuan province in 2000. It yield 6.17% higer than that of check Shanyou63 in the regional test of China in 2002. It yield more than 15% higer than that of check Shanyou63 in the yield trials test of China in 2003.it yeild 924.45kg/666.7m2 and 736.9 kg/666.7m2 in Hanyuan and Luxian of Sichuan province.it broke the record of 700kg/666.7m2 in south Sichuan.
2. wide-adaptability and good grain quality,endued the “security rice” by Chinese people.
It is characeristic of high and stable yield,fine grain quality,strong blast resistance and wide adaptability .
2.1 high and stable yield its ratoon rice yeild 100-250kg/666.7 m2 in the south Sichuan.it will yeild more than 800kg/666.7 m2 add up to the medium rice on the conditions of right climate and science culture technic.
2.2 good response to nutrient and logding resistance it has strong radication and stems ,which decides its high yiled with response to nutrient and logding resistance.
2.3 great cold endurance. It has great cold endurance in seeding stage.its can’t be influence in cold climate.
2.4 great heat endurance and high setting percentage. This character is abvious in heading poeriod and blooming stage.when the temperature is higher 35 degree ,it can keep the setting percentage at about 90%compared which of other variety with 30%.it is popular in rice planter.
2.5 wild adaptability its growth period is right, 5-7days more than Shanyou63,it is in favour of escape form dieasese such as rice planthoppers.it has good plant type and length with the thousand-kernel weight 29g,the resistant of leaf in 4-8level.
It adapt to plant in the yangtze valley as the medium variety or
the late rice.
3.key measure of culture
3.1 sow the seed according to the plant stubble period
3.2 close planting and transplanting at right time
3.3 fertilize balance
3.4 pest control
3.5 harvest at full ripe stage
4. the condition of popularization
Nowadays,it is wildly planted in north China.it’s also grown in foreign countries as Viet Nam,Bengal,Laos,etc.
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8、高产、早熟杂交水稻新品种
高产、早熟杂交水稻新品种
K优877
该品种2002年通过四川审定,2006年广西引种认定。系国家发明奖应用成果。
特征特性 全生育期比对照汕窄8号长5天,株高85-86cm,亩有效穗16-17万,每穗着粒数130-140粒,结实率80%左右,千粒重28-29克。该品种株型较紧凑,分蘖力较强,叶色深绿,叶鞘、叶缘和柱头均为紫色,抗稻瘟病能力优于对照。
产量表现 2000-2001年参加四川省区域试验两年平均亩产比对照汕窄8号增产7.36%;2001年生产试验,平均亩产比汕窄8号增产8.55%。
适宜种植地区 适宜在 四川、江西、广西、湖南、贵州、湖北等地种植汕窄8号、汕优77的地区种植。
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9、四川省重点推广品种--川麦44
优质、高产、抗病小麦新品种
川麦44
(川审麦2004004)
特征特性:春性、早熟,全生育期185天左右,比对照川麦107早熟1-3天。分蘖力中等,芽鞘绿色,苗叶绿色,叶片较长。株高80-85厘米。穗长方形、长芒、白壳、白粒、半角质,千粒重45克左右。经鉴定,高抗条锈病,高感白粉病,感赤霉病。品质分析,容重761.25克/升,蛋白质含量14.287%,湿面筋29.5%,沉降值38.975毫升,面团稳定时间6.3分钟,达到中筋小麦品种标准。
产量表现:2003年参加省区试,平均亩产349.43公斤,比对照川麦107增产8.57%,差异极显著,居区试C组第3位。2004年省区试平均亩产328.47公斤,比对照川麦107增产8.73%,差异极显著,居区试优质组第1位。两年区试平均亩产338.95公斤,比对照增产8.65%。20点试验18点增产,增产点占90%。2004年生产试验平均亩产348公斤,比对照川麦107增产11.3%。
栽培要点:播种期10月底至11月初,亩基本苗12-13万,亩施纯氮12-14公斤,配合磷、钾肥施用。抽穗后及时防治蚜虫和赤霉病。
适宜种植地区:适宜四川平坝、丘陵区种植。
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10、优质、高产杂交水稻--金佳丝苗
金 佳 丝 苗
四川省农科院水稻研究所与四川川种种业有限责任公司用自育不育系308A与自育恢复系R202配组育成。于2006年通过江西省农作物品种审定委员会审定。
一、产量:2003年在四川省多点试验平均亩产612.6公斤;比对照汕优63增产7.62%。2004江西省区试平均亩产552.13公斤,比CK汕优63增产4.56%,第二位。2005年江西省区试试验平均比CK汕优63增产7.27%,位居试验第三位。
二、米质:
抽样送中国水稻所稻米及其制品质量监督检验中心测定,金佳丝苗米质优,透明度达到2.0级。长宽比2.9,糙米率80.9%,精米率74.2%,胶稠度68mm,垩白率14.7%,垩白度2.89%, 直链淀粉含量15.8%。达到国标三级优质米。
三、抗性:
江西省区试试验稻瘟病抗性自然诱发鉴定,苗瘟2级,叶瘟4级,穗瘟发病率28.57-35.60%、结果金佳香稻综合抗病级数为7级,对照汕优63为9级。
四、特征特性:
谷粒黄色,长粒型,颖尖紫色无芒。株高115cm左右,苗期长势旺,株型适中,,叶色浓绿。穗大粒多,综合性状较好。全生育期在江西5月上旬播种130天左右,与汕优63相当。
五、适宜种植汕优63、Ⅱ优838区域作一季中稻种植。
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11、高产、优质、香型杂交中稻--倍香3号
高产、优质、香型杂交中稻
倍香3号
(豫审稻2006005)
2006年通过河南省审定。
该品种全生育期与对照Ⅱ优838相当。株高115cm左右,株型适中,叶色浓绿,长势繁茂,穗层整齐,后期落色好。分蘖力较强。抗倒伏能力中等。穗长25cm左右,每穗总粒数160粒左右、实粒数130粒左右,结实率80%左右。谷粒形状为长椭圆形,稃尖紫色、无芒,千粒重29.2g。抗稻瘟病能力好。米质优,有香味,品质达国优3级标准。
2004年参加河南省南部稻区中籼稻区域试验,平均亩产599.0公斤;2005年续试,平均亩产535.5公斤。两年平均亩产567.25公斤。
适宜长江流域、南方稻区种植Ⅱ优838地区作一季中稻种植。
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12、国审杂交中稻品种--皖稻125
高产、优质杂交稻—皖稻125
一、品种来源:安徽省农科院水稻所育成。四川川种种业有限责任公司在湖南、江西、福建省独家生产经营。
二、产量表现:2002年安徽省区试,合肥试点715.8公斤,比对照汕优63增产14.07%,居第一位。2003年安徽省区试,平均比汕优63增产14.90%,居第一位。8个试点全部增产,其中5个试点居第一位。增产最大幅度25.78%,同年生产试验比对照增产13.38%,6个试点均增产,居第一位。安徽省区试、生产试验双料冠军。2004-2005年参加国家长江中下游区试平均亩产586.30公斤。最高亩产691.7公斤。比对照Ⅱ优838增产7.32%,增产最大幅度22.4%.生产试验平均亩产573.9公斤。比对照Ⅱ优838增产8.19%。该品种一般亩产650公斤左右,高产可达750公斤以上。
三、品种特征特性:谷粒黄色,长粒尖,颖尖紫色无芒。株高110CM左右,苗期长势旺,株型适中,叶片直立,叶色浓绿。穗大着粒较密,综合性状较好。全生育期132天左右,与汕优63相当。
四、米质
米质经农业部测试,皖稻125糙米率82.1%,胶稠度,垩白率32%,垩白度3.5%, 直链淀粉含量21%精米率、碱消值等九项指标达优质米二级标准以上,。皖稻125米质明显优于对照汕优63,基本达到国标三级优质米。
五、抗性
国家区试抗性两年综合表现:稻瘟病加权平均6.9级,穗瘟损失率1-9级,抗性频率80%。
六、适宜在湖南、江西、福建省种植汕优63区域作中稻种植。
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13、川香8号
香型、高产、抗病杂交水稻新品种
川香8号
该品种已经通过四川省、河南省审定.
产量表现:2003年四川省区试中比对照汕优63增产5.10%。2003年生产试验,五点平均亩产571.5公斤,较对照汕优63增产6.90%。2004年长江中下游区试比对照增产8%以上。2005年参加长江中下游区域试验,表现优良.
特征特性:米质优,米粒中长,有光泽、偏透明,具泰米香味,米饭香、软、滑,口感好。农业部稻米及制品质量监督检验测试中心测试结果表明,米质较好,8项主要指标达到部标优质米标准。是国内将产量与品质结合较好的杂交水稻品种之一。全生育期比对照汕优63长3-4天,株型适中,穗大粒多,结实率高。抗稻瘟病能力强。是目前同类品种综合表现较好的品种之一。
适宜种植区域:南方稻区适合汕优63种植地区均可种植;长江中下游及华南沿海热量较好的双季稻区可作早、晚稻种植。
2002年12月获四川省第三届“稻香杯”优质米称号,
2005年12月获第二届中国国际农业博览会金奖。
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14、高产、抗病杂交水稻--川种305
川种305
(区试名:倍香4号)
四川川种种业有限责任公司选育的杂交香稻新品种。已于2006年通过江西省农作物品种审定委员会审定。
一、产量:2003年在四川省多点试验平均亩产658.06公斤;比对照汕优63增产11.33%。2004江西省区试平均亩产550.07公斤,比CK汕优63增产4.17%,2005年江西省区试试验平均比CK汕优63增产10.20%,位居试验第一位。一般亩产650公斤左右,高产可达750公斤以上。
二、米质:
米粒中长,有光泽、偏透明,具泰米香味,米饭香、软、滑,口感好。是国内将产量与品质结合较好的杂交香稻品种。
三、抗性:
江西省区试试验稻瘟病抗性自然诱发鉴定,苗瘟0级,叶瘟7级,穗瘟发病率20-20.8328%、抗病级数为5级,对照汕优63为9级。
四、特征特性:
该品种株型适中,叶色淡绿,长势繁茂。谷粒黄色,结实率高,熟期转色好。株高117.6CM,耐肥抗倒,苗期长势旺,株型适中,,叶色浓绿。穗大粒多,综合性状较好。全生育期在江西5月上旬播种130天左右,比汕优63长2天。
五、适宜种植区域:适宜种植汕优63、Ⅱ优838区域作一季中稻种植。
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15、倍香6号
优质、高产、抗病杂交中稻品种
倍香6号
该品种系四川省农科院水稻高粱所选育的国家发明奖应用成果之一。
全生育期比对照汕优63迟1-2天。穗大,结实率高,分蘖力较强。米质较好,食味上等。抗稻瘟病能力明显优于对照汕优63。外观品质及食味品质明显优于对照。
省区试生产试验比对照汕优63增产5.83%。
适宜四川、重庆及长江流域种植汕优63地区作一季中稻种植。
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16、K优17
优质高产、广适应性、中熟杂交水稻新品种
K优17
(倍丰1号)
该品种是四川省农科院水稻高粱研究所育成的保护品种。1999年通过国家审定。
作中稻栽培,全生育期比汕优63早5-7天,比金优725早2_3天,一般亩产为600-650公斤。作晚稻栽培,全生育期比汕优46相当,一般亩产550-600公斤。结实率高,千粒重大。分蘖力较强,株型紧凑,杆硬抗倒。苗期耐寒、穗期耐高温;稻米品质中偏上。在95-96年全国区试中创造了“两年平均绝对产量第一(581.92公斤);增产幅度第一(24.49%);日产量第一(4.3公斤);增产点次百分率第一(两年30个点次100%增产)”(摘自川科鉴字[2002]第126号《水稻耐热、高配合力籼粳交恢复系泸恢17的创制与应用》成果鉴定意见)的历史记录。
近几年在四川、湖南、安徽、河南、贵州、湖北、广西、江西、云南、重庆等地大面积种植,表现为优质、高产、大穗、适应性强等特点。适宜于长江流域稻区作中熟中稻栽培或作晚稻种植,是各地蔬菜种植区作接茬作物种植最适宜品种之一。
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17、K优404
高产稳产杂交早籼组合
K优404
该品种系三系杂交早稻组合。全生育期在江西、湖南、浙江及福建中北部地区为116天。苗期耐寒,叶色深绿,株型紧散适中。株高91厘米左右,结实率好,千粒重大。出米率高。叶瘟0-7级,穗瘟0-7级,白叶枯3-9级。
产量表现:1997年参加南方稻区早籼中迟熟区试,平均亩产比对照浙733和博优湛19分别增产10.1%和23.4%;1998年续试,平均亩产比对照浙733增产10.1%。表现丰产稳产,适应性较广。
适宜在种植汕优402、金优402、K优402的区域种植,也可在四川、重庆、贵州山区种植汕窄8号的区域种植。
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18、K优8527
大穗大粒、高产稳产、优质杂交中稻
K优8527
该品种系四川农业科学院水稻高梁研究所选育的中籼迟熟杂交水稻新组合。
该品种全生育期与汕优63相当。主要表现穗大粒多,结实率高,千粒重大,株型紧凑,转色好。外观品质、抗性等均优于汕优63。
产量表现:2001年参加四川省区试比对照汕优63增产4.48%,2002年较对照增7.86%。22个点全部增产,两年平均亩产比对照增产6.6%。2002年8点生产试验平均亩产比对照增产10.97%。
适宜在南方稻区种植汕优63的地区作一季中稻种植。
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19、精品 Ⅱ优7号
中国超级稻 2005年全国水稻主导品种之一
精品 Ⅱ优7号
四川省农业科学院水稻高粱研究所选育。农业部确定的超级稻品种之一。父本泸恢17已经于1997年获国家发明专利权。
97年四川省区试汇总平均比对照汕优63增产5.35%。全省区试生产试验比对照汕优63增产7.53%,2004年对获国家专利保护的父本泸恢17成功提纯复壮。改良复壮后的精品Ⅱ优7号更具高产、稳产。抗倒能力极强。苗期耐低温、穗期耐高温。
熟期适中,全生育期比对照汕优63长1-2天。抗性明显优于对照,米质较好,99年被四川省农业厅评为“稻香杯”优质米。
适宜四川及南方稻区作一季中稻或中稻+再生稻种植,也可作为晚稻迟熟品种种植。
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20、K优817
优质、超高产、大穗、高结实率早中熟杂交水稻新品种
K优817
该品种系四川省农业科学院水稻高粱研究所选育。是农业部侯选超级杂交晚稻新品种。
特征特性:该品种在四川省区试中全生育期比对照辐优838短1-2天;在全国区试中,比对照汕优64长3-4天。株高108厘米,株型紧散适中,分蘖力强;穗大粒重,结实率高;米质测试,糙米率82.02%、精米率69.49%、长/宽2.9。
产量表现:在四川省区试中,两年平均亩产比对照辐优838增产8.94%;在1999年生产试验中平均亩产593.8公斤,比对照辐优838增产14.56%,最高亩产742公斤;2001-2002年全国区试产量居第一位,比对照汕优64增产12.68%,生产试验比对照增产11.67%。
2004年10月22日,江西省农业厅组织专家在玉山县进行田间产量测产,比当地主栽品种(或)组合增产15%以上,平均亩产达656.8公斤。
适宜在种植汕优46、K优17、辐优838的地区,既可作为中熟中稻种植,也可作为晚稻种植。
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21、36优959
高产稳产杂交水稻新组合
36优959
该组合2001年参加安徽省区试,平均亩产657.8公斤,比对照增产达极显著水平;2002年续试,平均亩产576.37公斤,比对照增产9.14%,达极显著水平;全部区试地点均增产。2003年参加生产试验,比对照增产12.73%。
全生育期比汕优63长2-3天。株型适中,苗期长势旺,茎杆粗壮,耐肥抗倒,综合性状好,结实率高,抽穗整齐,后期转色好。秧龄弹性大。产量高,稳产性好,适应性广。
该组合适宜在长江流域及相似生态区的汕优63、Ⅱ优838种植区作一季中稻种植。
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22、冈优615
大穗、高产杂交水稻新品种
冈优615
(倍丰2号)
特征特性:该品种全生育期比汕优63迟熟2-3天。株高110厘米左右,繁茂性好,苗期较耐寒,分蘖力较强,穗大粒多,结实率高,千粒重大。
产量表现:1999年生产试验,平均亩产较对照增产6.3%。近几年在四川、重庆、贵州、湖南、湖北、江西、福建等各地大面积种植表现良好。
适宜种植地区:适宜汕优63种植区域种植。
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23、超级杂交水稻Ⅱ优602
中国超级稻、2005全国水稻主导品种之一
Ⅱ优602
(倍丰3号)
该组合系四川省农科院水稻高粱研究所选育的超级杂交水稻。2004年通过国家审定,并被列为2005年全国50个水稻主导品种之一,重庆市2006年主导品种。
2000年四川省区试,平均亩产比对照汕优63增产8.61%,居试验组第一位。2002年参加国家区试,比对照汕优63增产6.17%。2003年参加国家生产试验,最高亩产比对照汕优63增产15%以上。2004年,经四川省农业厅、科技厅组织专家验收,在四川汉源县农户自主种植田块亩产达924.45公斤;在泸县“国家丰粮工程”示范片亩产达736.9公斤,突破了川东南再生稻区头季亩产700公斤大关。
该品种自2002年开始在四川、安徽、湖北、重庆、江西、湖南、广西、贵州、江苏、浙江等地大面积种植,表现为:高产稳产、耐肥抗倒、耐寒抗热、粒大粒重、结实率高,具有广泛的适应性和稳产性。全生育期比汕优63迟熟2-3天。株高适中,株型较好,熟期转色好。再生力强。米粒外观及食味品质中上。
适宜长江流域及南方稻区种植汕优63、Ⅱ优838、Ⅱ优725的区域作一季中稻。
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24、K优77
品种名称:K优77
品种审定编号:国审稻2001007
该品种属晚籼早熟型三系杂交水稻品种。全生育期117天左右,比汕优64长1~2天。株叶型态好,熟期适中,高产、稳产,米质中等偏上,感稻瘟病及白叶枯病。适宜在湖南、湖北、江西、安徽、浙江省稻瘟病、白叶枯病轻发区作双季晚稻种植。
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