杂交中稻成穗率的限制因素及其高产栽培技术研究

Study on Limiting Factors of Influencing Hybrid Rice Ear and High Yield Cultival Ways

以II优7号为材料,通过不同疏穴时期、疏穴规格及三角形施氮方式处理,研究了影响杂交中稻成穗率的限制因素及其高产栽培途径。结果表明,最高苗期前后是影响水稻成穗率的环境敏感期,光照是该期影响成穗率的主导因素,增施氮肥对提高成穗率的作用不如改善光照条件的大,而且只有在群体基部光照条件改善的情况下才会起到明显作用。采取"三角形栽培改善最高苗期的群体基部光照条件和N-n-2期施上林氮肥"的栽培途径,具有显著降低苗峰、壮苗以及提高成穗率和着粒数的作用而增产,但其增产程度与稻田土壤肥力有关。

With II you No. 7 as material to study the limiting factors of influencing hybrid rice earbearing and high yield cultival ways by hole application The results showed that the period before or riod for influencing rice percentage of stage, hole application standard and triagle application N fertilizer. behind seedlings number up to the most was the most sensitive peearbearing tiller. In all kinds of factors phase. The effect of increasing earbearing tiller percentage by adding nitrogen ,light was the lead factor in this less than by improving light, increasing nitrogen could increase colony basal improved. Adopted significantly percentage of earbearing tiller on condition that light condition ot triangle cultivation seedlings could improve colony basal light condition. In all, triangle cultivation seedlings and applying nitrogen at n-2 period was relatively good measures for rice production. Through these measures, seedlings became strong and number decreased significantly, percentage of earbearing tiller and number of grains per ear increased,led to increasing yield finally, but the extent of yield increasing correlated with soil fertility.