不同种植密度和施肥量对湘杂油763产量及养分吸收的影响

采用大田小区试验,研究了优质杂交冬油菜新品种湘杂油763在6种不同密度和5种不同施肥水平下,籽粒产量和N、P2O5、K2O、S、B吸收量的变化。结果表明,无论密度高低籽粒产量均随着施肥量的增加而增加,但是高密度条件下的增加幅度小于低密度条件;施肥量较低时籽粒产量随着密度的增加而增加,高施肥量高密度条件下反而下降。所有处理中以中密度(22.5万/hm2)和高施肥量(N、P2O5、K2O、B施用量为240、120、210、1.2 kg/hm2)处理的籽粒产量最高。养分吸收量,相同密度条件下随施肥量的变化趋势与产量相同,均随着施肥量的增加而增加;相同施肥量条件下随密度的变化趋势则与产量不同,高施肥量条件下N、P、K吸收量以密度为22.5万/hm2的最高,其余施肥量条件下,N、P吸收量随着密度的增加而增加,而K的吸收量随密度的变化较小。S、B的吸收量均没有随密度的变化而发生有规律的变化。

Effect of Planting Density and Fertilizer Application Amount on the Yield and Nutrient Uptate of Xiang Hybrid No.763

Small plot experiment was carried out in the fields to study the changes in grain yields and uptake amounts of nutrients N,P2O5,K2O,S,B of new hybrid winter rapeseed variety Xiang hybrid No.763,under conditions of six planting densities and five fertilizer rates.The results of measured grain yield showed that whether density was high or low,grain yield under same planting density increased with applying fertilizer rate,but the intensity of yield increase under high planting density was smaller than that und...