| 机插杂交粳稻基本苗数对分蘖发生与成穗的影响 |
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| 引用本文： | 乔晶,王强盛,王绍华,刘正辉,郝建华,丁艳锋.机插杂交粳稻基本苗数对分蘖发生与成穗的影响[J].南京农业大学学报,2010,33(1). |
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| 作者姓名： | 乔晶 王强盛 王绍华 刘正辉 郝建华 丁艳锋 |
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| 作者单位： | 南京农业大学农业部南方作物生理生态重点开放实验室,江苏,南京,210095 |
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| 基金项目： | 国家科技支撑计划项目(2006BAD02A03,2008BAD96B05);;国家科技计划重点项目(2007EA690004);;江苏省科技招标项目(BE2007307) |
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| 摘 要： | 以杂交粳稻常优1号为材料,设置25.05、50.10和75.15万株·hm~(-2) 3个基本苗数,进行机插秧新生分蘖跟踪挂牌,研究各级分蘖的发生率及成穗率特征。结果表明:机插杂交粳稻栽插50.10万株·hm~(-2)基本苗时群体有效穗数最多,产量最高;机插杂交粳稻分蘖发生和成穗主要集中在2/0、3/0、4/0、5/0和6/0的一级分蘖及1/2、1/3和1/4的二级分蘖;随着基本苗数增加,分蘖发生数减少,最终成穗数也减少,同时高位分蘖对产量的贡献也减少,单茎重、各蘖位的每穗粒数和占最终穗数的比例均减小。机插杂交粳稻移栽时以50.10万株·hm~(-2)基本苗为宜,过多或过少都影响机插杂交粳稻分蘖发生、蘖位利用和成穗数。
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| 关 键 词： | 杂交粳稻 机插秧 分蘖发生率 分蘖成穗率 产量 |
Effects of basic seedlings on tiller emerging and earbearing of machine-transplanted hybrid japonica rice |
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| QIAO Jing,WANG Qiang-sheng,WANG Shao-hua,LIU Zheng-hui,HAO Jian-hua,DING Yan-feng.Effects of basic seedlings on tiller emerging and earbearing of machine-transplanted hybrid japonica rice[J].Journal of Nanjing Agricultural University,2010,33(1). |
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| Authors: | QIAO Jing WANG Qiang-sheng WANG Shao-hua LIU Zheng-hui HAO Jian-hua DING Yan-feng |
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| Institution: | Key Laboratory of Crop Physiology and Ecology in Southern China/a>;Ministry of Agriculture/a>;Nanjing Agricultural University/a>;Nanjing 210095/a>;China |
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| Abstract: | Hybrid japonica rice Changyou 1 was machine-transplanted in three basic seedlings density,250 500,501 000 and 751 500 seedlings per hm~2.The tiller emerging rate and tiller earbearing rate were investigated.Results showed that colony of 501 000 seedlings per hm~2 had the highest effective panicle number and produced the highest grain yield.Most of tillers emerged and earbeared from 2/0,3/0,4/0,5/0,and 6/0 primarily and 1/2,1/3,and 1/4 secondary.With the increasing of basic seedling density,the number of til... |
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| Keywords: | hybrid japonica rice machine-transplanted rice tiller emerging rate tiller earbearing rate yield |
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