| 水稻甬优12不同产量群体的株型特征 |
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| 引用本文： | 韦还和,李超,张洪程,孙玉海,马荣荣,王晓燕,杨筠文,戴其根,霍中洋,许轲,魏海燕,郭保卫.水稻甬优12不同产量群体的株型特征[J].作物学报,2014,40(12):2160-2168. |
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| 作者姓名： | 韦还和 李超 张洪程 孙玉海 马荣荣 王晓燕 杨筠文 戴其根 霍中洋 许轲 魏海燕 郭保卫 |
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| 作者单位： | 1.扬州大学农业部长江流域稻作技术创新中心, 江苏扬州 225009；2 浙江省宁波市农业科学院作物研究所，浙江宁波 315101；3浙江省宁波市种子公司，浙江宁波315101；4浙江省宁波市鄞州区农业技术服务站，浙江宁波 315100? |
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| 基金项目： | 本研究由农业部超级稻专项(02318802013231), 粮食作物精确定量栽培技术研究与示范(201303102)和宁波市重大科技项目(2013C11001)资助。 |
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| 摘 要： | 以籼粳交超级稻甬优12为试材，比较研究高产(10.5~12.0 t hm-2)、更高产(12.0~13.5 t hm-2)、超高产( >13.5 t hm-2) 3个群体的株型特征。结果表明，穗长、穗粒数、一次和二次枝梗数，超高产群体分别为21.56、356.34、20.46和73.98 (两年平均值)，均高于对应的高产和更高产群体，但一次和二次枝梗的结实率略微降低。超高产群体上部三叶的长、宽以及卷曲率高，倒一、二、三叶的卷曲率分别为1.84、1.47、1.26，叶基角和披垂度小，抽穗后的主茎绿叶数多。超高产群体株高为143.50 cm，分别较更高产、高产群体高1.98%和3.83%，上部第一、二、三节间长度增加，穗长加穗下节间长占株高比例、穗下节间占秆长比例高，分别为39.84%和37.75%；基部第一、二、三节间长度缩短，茎秆粗度和茎壁厚度增加，茎、鞘干物重以及K、Si含量高，提高了基部节间的抗折力同时降低了倒伏指数。
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| 关 键 词： | 甬优12 超高产 株型特征 |
| 收稿时间： | 2014-04-02 |
Plant-type Characteristics in Populations with Different Yield of Yongyou 12 |
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| WEI Huan-He,LI Chao,ZHANG Hong-Cheng,SUN Yu-Hai,MA Rong-Rong,WANG Xiao-Yan,YANG Jun-Wen,DAI Qi-Gen,HUO Zhong-Yang,XU Ke,WEI Hai-Yan,GUO Bao-Wei.Plant-type Characteristics in Populations with Different Yield of Yongyou 12[J].Acta Agronomica Sinica,2014,40(12):2160-2168. |
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| Authors: | WEI Huan-He LI Chao ZHANG Hong-Cheng SUN Yu-Hai MA Rong-Rong WANG Xiao-Yan YANG Jun-Wen DAI Qi-Gen HUO Zhong-Yang XU Ke WEI Hai-Yan GUO Bao-Wei |
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| Institution: | 1.Innovation Center of Rice Cultivation Technology in Yangtze River Valley, Ministry of Agriculture, Yangzhou University, Yangzhou 225009, China;2.Crop Research Institute, Ningbo Academy of Agricultural Sciences of Zhejiang Province, Ningbo 315101, China;3.Ningbo Seed Company of Zhejiang Province, Ningbo 315101, China;4.Ningbo City Yinzhou District Agricultural Technology Service Station of Zhejiang Province, Ningbo 315100, China |
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| Abstract: | Using indica-japonica super rice Yongyou 12, we compared the plant-type characteristics among three types of populations (high yield: 10.5–12.0 t ha-1; higher yield: 12.0–13.5 t ha-1; super-high yield: >13.5 t ha-1). The main results indicated that in super-high yield population, the mean values of panicle length, total grains per spike, number of the primary and secondary rachises were 21.56, 356.34, 20.46, and 73.98, respectively, being higher than those in the high and higher yield populations. However, the seed-setting rate in the primary and secondary rachises showed slight reduction. Super-high yield population had longer length, larger width and higher rolling rate, smaller leaf basic angle and dropping angle, more green leaves after heading for the top-most three leaves in comparison with the other two populations. Compared with the other two populations, super-high yield population had higher plant height, longer length of top three internodes, higher ratio of sum of panicle and neck internode to plant height 39.84% and ratio of neck internode to stalk length 37.75%. The decreased length of basal three internodes, increased culm diameter, culm wall thickness and dry weight of culm and sheath made higher anti-broken strength and lower lodging index in super-high yield population. |
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| Keywords: | Yongyou 12 Super-high yielding Plant-type characteristics |
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