氮磷钾肥对迟直播油菜产量和品质的影响

以甘蓝型油菜品种中双10号（ZS10）和中油杂5号（ZYZ5）为材料,研究迟直播条件下氮、磷、钾的＂3414＂肥料效应,确定最佳施肥量以减少迟直播对油菜产量和品质的影响。研究结果表明,各施肥处理对总生育期和苗期各指标影响不大。ZS10的主花序长、总角果数、千粒重与氮肥显著相关;ZYZ5的实际产量与氮肥显著相关。磷肥与各性状间关系不显著;钾肥与ZS10的每角果粒数、ZYZ5的实际产量达到显著相关。随着氮肥增加,菜籽含油量下降而蛋白质增加;磷肥对菜籽蛋白质含量和含油量影响不大;适量的钾肥有利于含油量的增加但对蛋白质含量影响较小。

Effects of N,P,K fertilization on yield and quality of delayed direct-seeding rapeseed （ Brassica napus L. ）

Two rapeseed （ Brassica napus L. ） cultivars Zhongshuang 10 （ ZS10） and Zhongyouza 5 （ ZYZ5） were used to study the optimal effects of fertilization on yield and quality under delayed direct-seeding condition. The fertilizers included nitrogen （ N） ,phosphorus （ P） and potassium （ K） . It was found that there were significant effects on agronomic traits and qualities,but less effect on seedling period and total growth stage. Greater amount of N fertilizer increased seed protein and decreased oil content. Increased N also led to significantly longer main inflorescence,greater silique number and 1 000-seed weight of ZS10,and higher yield of ZYZ5. Suitable K increased oil content and K had less effect on protein content. There were significant effects of K on seeds per silique of ZS10 and yield of ZYZ5. On the contrary,P level seemed to have less effects on seed quality and agronomic traits of these two cultivars.