The hilly area of Southwest China is a typical rice production area which is limited by seasonal droughts and low temperature in the early rice growth period. A field experiment was conducted on three typical paddy fields(low-lying paddy field, medium-elevation paddy field, and upland paddy field) in this region. Nitrogen(N) treatment(180 kg N ha^-1 year^-1) was compared to a control treatment(0 kg N ha^-1 year^-1) to evaluate the effects of integrated ric...

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