作物学报Issue(11)：1767-1776,10.DOI:10.3724/SP.J.1006.2015.01767
机插密度对不同类型水稻抗倒伏能力及产量的影响
Effect of Mechanical-Transplanting Density on Lodging Resistance and Yield in Different Types of Rice
摘要
Abstract
In order to study impacts of planting density of mechanical-transplanting rice on lodging resistance and yield, a field experiment was conducted usingindica-japonica hybrid rice Yongyou 2640, Yongyou 1640 andindica hybrid rice Fengliangy-ouxiang 1, Xinliangyou 6380 with six planting densities (A: 31.7 cm × 30 cm, B: 22.2 cm × 30.0 cm, C: 17.1 cm × 30.0 cm, D: 13.9 cm × 30.0 cm, E: 11.7 cm × 30.0 cm, F: 10.6 cm × 30.0 cm). The experimental results were as follows. With the increasing of transplanting density, the yield increased firstly and decreased then, with the highest yield at 13.9 cm × 30.0 cm, both forin-dica-japonica hybrid rice andIndica hybrid rice. The effects of densities on the two types of varieties were not entirely consistent. Under the densities of C–E, the yield ofindica-japonica hybrid rice was higher than 10.5 t ha–1, and little or no lodging occurred. Therefore, we could obtain high and stable yield. Under the density of D, the yield ofindica hybrid rice was higher than 10.0 t ha–1, and the apparent lodging rate was also higher, so it was difficult to obtain stable yield. With the increasing of transplanting densities, lodging index of two types of rice increased, and stem diameter, wall thickness of culm and dryweight of aunit inter-node in two types of rice decreased. With increasing filling time, lodging index of indica-japonica hybrid rice increased firstly and decreased then, with the peak value at 30 days after heading, wall thickness of stem, plumpness of internode and single stem weight decreased firstly and increased then, with a minimum value at 30 days after heading. Lodging index ofindica hybrid rice was increasing, stem wall thickness was decreasing, plumpness of internode decreased firstly then decreased or increased slightly at 30 days after heading, but not obvious, single stem weight decreased firstly and increased then, with a minimum value at 30 days after heading. The sensitive period of lodging was around 30 days after heading.关键词
籼粳杂交稻/杂交籼稻/产量/机插密度/倒伏敏感时期/抗倒伏能力Key words
Indica-Japonica hybrid rice/Indica hybrid rice/Yield/Mechanical-transplanting density/Lodging sensitive period/Lodging resistance引用本文复制引用
许俊伟,孟天瑶,荆培培,张洪程,李超,戴其根,魏海燕,郭保卫..机插密度对不同类型水稻抗倒伏能力及产量的影响[J].作物学报,2015,(11):1767-1776,10.基金项目
本研究由国家粮食丰产科技工程项目(2011BAD16B03),国家公益性行业(农业)科研专项(201303102),江苏省科技支撑计划项目(SBE2015310569)和江苏省农业科技自主创新基金项目(CX[12]1003.9)资助。 （2011BAD16B03）
