不同施氮量及不同施肥时期对油研九号产量和品质的影响

Effects of Different Nitrogen Amounts and Applying Times on Yield and Quality of Youyan 9

对油研九号不同施氮量下的产量和品质进行了研究。结果表明,不同施氮量对油研九号产量的影响存在极显著差异,等量的氮肥作活棵肥、开盘肥或作腊肥对产量和品质的影响未达到显著水平,等量的氮肥在前中期 (作活棵肥和开盘肥)施、或在中后期(作开盘肥和腊肥)施、或在前后期(作活棵肥和腊肥)施对产量和品质的影响不显著。株高、根颈粗、有效分枝高度、单株一、二次分枝数、主花序长、角果数、千粒重、单株产量、角果层厚度、每hm2产量随施氮量的增加呈现有规律的增加,并与施氮量间均呈多项式函数关系y=A+Bx+Cx2 +Dx3。相关分析表明,硫甙、芥酸、蛋白质与施氮量间均呈显著负相关,含油率与施氮量间呈极显著负相关,品质性状与施氮量间均呈一元二次抛物线关系。试验结果表明,油研九号保优栽培的施氮量为 150kg/hm2,高产栽培的施氮量为 225kg/hm2。

The results show that there is very significant difference in yield of youyan 9 among different nitrogen amounts, but there is no significant difference in yield and quality when the same nitrogen amount is applied at early and middle seedling stages, early and late seedling stages or middle and late seedling stages. Plant height, diameter of root, effective branch height, numbers of first and second branch, length of main inflorescence, 1000-seed weight, thickness of pod canopy, yield per plant, pods per plant regularly increases with the increase of applying nitrogen amount, which corresponds to the function of y=A+ Bx+Cx^2+Dx^3. There is significant negative correlation between glucosinolate, erucic acid, protein and applying nitrogen amount, the very (significant) negative correlation between oil content and applying nitrogen amount, and the parabola relationship between quality (characters) and applying nitrogen amount. 150 kg/ha of nitrogen is good for maintaining quality of Youyan 9 and 225 kg/ha of (nitrogen) is good for high yield of Youyan 9.