中国水稻科学2017，Vol.31Issue(3)：265-277,13.DOI:10.16819/j.1001-7216.2017.6091
不同秧龄下机插方式与密度对杂交稻光合生产及产量的影响
Effects of Mechanically-transplanted Modes and Density on Photosynthetic Production and Yield in Hybrid Rice at Different Seedling-ages
摘要
Abstract
[Objective]In order to elucidate the effects of mechanical transplanting modes and density on photosynthetic production characteristics and yield of super hybrid rice (F you 498) and to lay a theoretical basis for the application of mechanical transplanting, [ Method ] a split-plot design was used as follows: bowl mechanical-transplanting with high density (M1D1), bowl mechanical-transplanting with middle density (M1D2), bowl mechanical-transplanting with low density (M1D3), carpet mechanical-transplanting with high density (M2D4), carpet mechanical-transplanting with middle density (M2D5), and carpet mechanical-transplanting with low density (M2D6) using 25-day-old and 40-day-old seedlings. [Result]The seedling-age and mechanically-transplanted modes coupled with density and grain yield played a significant role in the regulation of main growth stages in rice. The seedling quality, number of tillers, leaf area index (LAI), exportation and export rate of leaf,culm and sheath per shoot, dry matter weight per stem and population, dry matter accumulation during each stage, population growth rate, photosynthetic potential, net assimilation rate after heading stage and yield for 25-day-old seedling were significantly better than those of 40-day-old ones under the same mechanical-transplanting modes and density. The number of stems and tillers, leaf area index of each period and leaf area decay rate, dry matter weight of population, photosynthetic potential, and the dry matter accumulation before heading population growth rate, net assimilation rate before heading stage increased with the increasing density at the same seedling-age and mechanical-transplanting modes. The dry matter accumulation after heading, population growth rate, and net assimilation rate after heading under bowl mechanical-transplanting increased firstly and then decreased with the increase of density. In this experiment, M1D2 is the best. [Conclusion] For 25-day-old seedlings, the row of 33 cm and planting space of 15.5 cm had the advantages of total spikelet number and seed setting rate, and its yield was the highest. So the treatment could give full play to advantages of indica hybrid rice plant type of the local research area and improve photosynthetic production and yield. The yield will decrease when increase of seedling-age and planting density reduced of carpet mechanical-transplanting, which is because of the poor of population quality index and reduction of the number of effective panicles.关键词
秧龄/钵苗机插/毯苗机插/密度/产量/光合生产Key words
seedling-age/bowl mechanical-transplanting/carpet mechanical-transplanting/density/yield/photosynthetic production分类
农业科技引用本文复制引用
李应洪,王海月,吕腾飞,张绍文,蒋明金,何巧林,孙永健,马均..不同秧龄下机插方式与密度对杂交稻光合生产及产量的影响[J].中国水稻科学,2017,31(3):265-277,13.基金项目
国家科技支撑计划资助项目(2013BAD07B13) （2013BAD07B13）
四川省教育厅重点项目(16ZA0644) （16ZA0644）
四川省科技支撑计划资助项目(2014NZ0041,2014NZ0047). （2014NZ0041,2014NZ0047）
