氮钾配施对油菜产量及氮素利用的影响

李静,闫金垚,胡文诗,李小坤,丛日环,任涛,鲁剑巍

Effects of combined application of nitrogen and potassium on seed yield and nitrogen utilization of winter oilseed rape (Brassica napus L.)

Jing LI,Jin-Yao YAN,Wen-Shi HU,Xiao-Kun LI,Ri-Huan CONG,Tao REN,Jian-Wei LU

图3 不同施钾量下油菜产量对氮肥的响应及与目标产量对应的最佳施氮量 图中虚线表示产量为2500 kg hm-2时的氮钾肥用量, 点划线表示产量为3000 kg hm-2时的氮钾肥用量; 黑色实心点为2016-2017年平均产量, 空心点为2017-2018年平均产量。处理同表1。

Fig. 3 Rapeseed yield responses to N fertilizer application under different K fertilizer application rates and the optimal N and K fertilizer application rate for corresponding target seed yield The dashed line in the figure shows the N and K fertilizer application rate when the yield is set as 2500 kg hm-2, The dot dash line in the figure shows the N and K fertilizer application rate when the yield is set as 3000 kg hm-2; the black solid point is the average yield of 2016-2017, and the hollow point is the average yield of 2017-2018. Treatments are the same as those given in Table 1.