种植密度对中棉425干物质积累与分配的影响

为探究中棉425在长江流域棉区不同的种植密度下,各生育时期的干物质积累与分配的关系,于2020年在赣北地区进行田间密度试验.结果表明,种植密度对棉花干物质积累量有显著影响,随着种植密度的增加,棉花群体总干物质累积量也在增加;同一密度不同时期的群体总干物质积累量随着时间增加呈上升斜线或波浪式增长;但密度达到适宜的群体后,...

The Effects of Planting Density on Dry Matter Accumulation and Distribution of CCRI 425

In order to explore the relationship between the accumulation and distribution of dry matter in each growth period of CCRI 425 under different planting densities in the cotton area of the Yangtze River Basin,the experiment was conducted in northern Jiangxi in 2020.The results showed that planting density has a significant impact on the dry matter accumulation of cotton.With the increase of planting density,the total dry matter accumulation of cotton population also increases,the total dry matter accumulation of the population at the same density and different periods increases as time increases.However,when the density reaches a suitable population,the difference in dry matter is again will decrease.Dry matter accumulation is the fastest during the flowering and boll stage,and strengthening field management during this period is conducive to dry matter accumulation.Planting density changed the distribution of dry matter of cotton population.Too high or too low planting density is not conducive to the accumulation and distribution of dry matter of cotton.D4(8.25×104 plants/hm 2)treatment showed higher dry matter of reproductive organs.Quality and distribution have high yield potential.It is a suitable density for CCRI 425 to be widely promoted and planted in the Yangtze River Basin.