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采用田间小区定位试验研究自然降雨条件下稻秸全量还田对稻麦两熟农田麦季养分径流流失特征的影响。结果表明:麦季径流水量可达2 185.05 m3/hm2,秸秆还田(T1)处理可降低径流水量4.43%(p>0.05);常规施肥(T0)条件下,每1 hm2麦田径流流失全N(TN)和全P(TP)总量分别为30.90,3.00 kg,流失率分别达13.73%和3.34%;较T0处理而言,T1、T2(秸秆还田减肥)处理不仅减少TN和TP流失量分别达15.95%,33.50%和13.98%,15.71%(p<0.05),也能降低TN流失率分别达15.95%,16.87%(p<0.05)。同时,T1处理能够显著降低TP流失率达13.98%(p<0.05)。
A field experiment was conducted to study the effects of rice straw returning to soil on runoff and nutrient deficit in wheat - wheat double cropping under the conditions of natural rainfall. The results showed that the runoff of wheat crop was up to 2 185.05 m3 / hm2 and the return of straw to soil (T1) was 4.43% (p> 0.05). Under conventional fertilizer application (T0), the runoff loss per 1 hm2 of wheat field was N (TN) and total P (TP) were 30.90 and 3.00 kg, respectively, and the wastage rates were 13.73% and 3.34% respectively. Compared with T0 treatment, treatment of T1 and T2 not only decreased TN and TP loss (15.95%, 33.50% and 13.98%, 15.71% (p <0.05), respectively) also reduced the TN loss rates by 15.95% and 16.87%, respectively (p <0.05). At the same time, T1 treatment significantly reduced the TP loss rate by 13.98% (p <0.05).