双低油菜的磷钼营养效应研究

A study of phosphorus and molybdenum on nutrient effects in double-low rape

在西藏东南地区土壤有效磷、钼缺乏条件下进行磷钼不同水平组合对双低油菜影响的田间试验。结果表明 :( 1 )油菜籽粒产量及含油量随施磷量递增而极显著提高 ;磷钼互作或单施钼肥对籽粒产量亦具有极显著或显著增产效应 ,对籽粒粗脂肪含量则均无明显影响。各处理中以 P2 O5 2 2 5.0 kg/hm2 、Mo 1 .0 %组合的籽粒产量及粗脂肪含量最高 ,分别较对照增加 1 70 .9%和 2 1 .6%。( 2 )磷钼互作对油菜产量构成因素特别是角果数具有极为显著的调节效应。 ( 3 )不同磷素水平配合 ,油菜分枝产量占群体产量的比重随施钼量增加呈上升趋势 ,而随施磷量递增而大幅度提高 。

A field experiment in southeast of Tibet was conducted to study the effects of P、Mo nutrients in double low rape under the area of P、Mo deficiency. The result showed that the yield of rapeseed and oil content increased significantly by the increase of the amount of P、Mo application. P combination with Mo application or only applied Mo could increase the seed yield and oil content significantly, the highest yield and oil content of seed was obtained by applied P 2O 5 225.0kg/hm 2 and Mo 1.0%, which higher than that of CK by 170.9% and 21.6% respectively. There was marked effect of P and Mo application on the yield component, especially the seeds per pod and yield of branches, and the number of branches increased and the position of first branch descended by the use of P and Mo.