大田长期水氮处理对土壤氮素及小麦籽粒淀粉糊化特性的影响

李莎莎,马耕,刘卫星,康娟,陈雨露,胡阳阳,张盼盼,王晨阳

Effects of Long-Term Irrigation and Nitrogen Regimes on Soil Nitrogen Content and Paste Property of Wheat Grain

Sha-Sha LI,Geng MA,Wei-Xing LIU,Juan KANG,Yu-Lu CHEN,Yang-Yang HU,Pan-Pan ZHANG,Chen-Yang WANG

图3 水氮处理与0~20 cm土层硝态氮含量的关系 A: 2014-2015年度, Z = -3.04 × 10-5Y2 + 8.03 × 10-7X2 - 0.04X + 0.08Y + 3.56 (R2 = 0.97, P < 0.01)。B: 2015-2016年度, Z = -1.45 × 10-6Y2 - 5.12 × 10-7 X2 - 0.04X + 0.07Y + 5.08 (R2 = 0.98, P < 0.01)。式中, X为灌水量(m3 hm-2), Y为施氮量(kg hm-2), Z为土壤中硝态氮含量(mg kg-1)。

Fig. 3 Relations between nitrate nitrogen content in 0-20 cm soil layer and the water and nitrogen fertilizer coupling A: the 2014-2015 growth season, Z = -3.04 × 10-5 Y2 + 8.03 × 10-7 X2 - 0.04X + 0.08Y + 3.56 (R2 = 0.97, P < 0.01). B: the 2015-2016 growth season, Z = -1.45 × 10-6 Y2 - 5.12 × 10-7 X2 - 0.04X + 0.07Y + 5.08 (R2 = 0.98, P < 0.01). The variables in the equations are irrigation amount (X, m3 ha-1), nitrogen application rate (Y, kg ha-1), and soil NO3--N content (Z, mg kg-1).