高产水稻株系的抽穗前物质生产量、抽穗后物质生产量、生物产量以及经济系数均较高且变异系数相对较小。
Biomass production in the entire growth period, dry matter accumulated before and after heading stage, economic coefficient in high-yield rice were higher and their deviations were relatively narrow.
本文分析了水稻群体的个体质量分别与密度、产量和经济系数之间的数量关系；
This article analysis the quantitative relations between the single quality of a colony of rice plant and the density, output and economic coefficient.
随着土壤铬含量的增加，水稻生物产量显著下降，经济系数无明显变化。
Total biomass decreased significantly with increasing of soil Cr concentration, while economic coefficient showed no significant change.
增强光合性能，提高生物产量和经济系数，是旱作覆膜马铃薯增产的重要生理基础。
Enhancing photosynthetic function, improving biological yield and economic coefficient is an important physiological basis for increasing the yield of potatoes covered with film.
在最高产量时，紧凑型玉米品种与松散型玉米品种相比具有叶面积系数大，干物质积累数量大，经济系数高等特点。
At same time, the leaf area coefficient, dry matter accumulation and economic coefficient of compact type corn variety is bigger than loosely type corn variety.
研究了新玉9号正交种的密度效应，结果表明：1经济产量—密度方程呈渐近线型，经济系数—密度方程呈指数下降型。
We studied the density on Xinyu no. 9. The result showed that: 1 Economic yield density assume asymptote model; Economic coefficient density, exponential decay curve.
促进养分吸收，增强光合作用，提高生物产量和经济系数；
Film - covered can increase effective fertility of soil, advance nutrient absorption, strengthen photosynthesis.
促进养分吸收，增强光合作用，提高生物产量和经济系数；
Film - covered can increase effective fertility of soil, advance nutrient absorption, strengthen photosynthesis.
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