长期施肥紫色土有效磷变化及其对稻麦轮作产量的影响

任嘉欣,刘京,陈轩敬,张跃强,张勇,王洁,石孝均

Variation of Available Phosphorus in Purple Soil and Its Effects on Crop Yield of Rice-Wheat Rotation Under Long-Term Fertilizations

REN JiaXin,LIU Jing,CHEN XuanJing,ZHANG YueQiang,ZHANG Yong,WANG Jie,SHI XiaoJun

表3 长期施肥下紫色土土壤磷素农学阈值

Table 3 The critical P value of soil Olsen-P in purple soil under long-term fertilization treatments

模型 Model 小麦 Wheat 水稻 Rice 农学阈值 Agronomy threshold (mg·kg-1) 相对产量 Relative yield (%) R2 农学阈值 Agronomy threshold (mg·kg-1) 相对产量 Relative yield (%) R2 线性-平台模型 LP 10.10 88.3 0.643** 14.34 92.4 0.427** 双直线模型 LL 9.93 87.5 0.654** 13.28 92.9 0.548** BoxLucas模型 BL 9.17 79.5 0.595** 3.96 80.0 0.229** 米切里西模型 EXP 12.50 80.8 0.621** 10.01 84.0 0.414** 均值 Mean 10.44 84.1 — 10.73 87.4 —