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水稻的单位面积产量与栽插密度、每穴成穗数、每穗着粒数、实粒数、千粒重等因素都密切相关,但在不同的情况下各种因素的作用不同。通过对该年产量结构的调查和分析,找出生产中存在的问题,为制订今后的增产措施提供依据,对指导生产有重要的实际意义。从1975年到1982年,乐至县水稻的统计亩产从600多斤上升到1049斤,其中发展最快的是从1978年大面积推广杂交稻之后,亩产由700多斤上升到千斤水平。在实现水稻亩产的较大增加之后,还能否进一步更大增产,生产中还存在哪些问题,希望通过调查研究作出回答。本
The yield per unit area of rice is closely related to planting density, the number of spikes per spike, the number of spikes per spike, the number of true grains, and the weight of 1000-grains. However, the effects of various factors are different in different situations. Through the investigation and analysis of the annual output structure, we can find out the problems existing in the production and provide the basis for formulating the stimulation measures in the future, which have important practical significance for directing the production. From 1975 to 1982, the yield per hectare of rice in Lezhi County increased from 600 to 1,049 catties, of which the fastest-growing was the increase of 700-kilogram per mu to the catty level after the large-scale promotion of hybrid rice in 1978 . In the realization of a larger increase in rice mu produce, but also whether to further increase production, what are the problems in the production, hoping to answer the survey research. this