• 研究报告 •

节水减氮对再生稻和双季稻周年产量及氮肥利用效率的影响

1. 1湖南农业大学农学院， 长沙 410128；2宜宾职业技术学院， 四川宜宾 644000）
• 出版日期:2019-07-10 发布日期:2019-07-10

Effects of water saving and nitrogen reducing on annual yield and nitrogen use efficiency of ratoon rice and double rice.

ZHENG Hua-bin1, CHEN Qi-min2, CHEN Yuan-wei1, LI Bo1, ZHANG Yan-sheng1, TANG Qi-yuan1*

1. (1College of Agronomy, Hunan Agricultural University, Changsha 410128, China; 2Yibin College of Vocational Technology, Yibin 644000, Sichuan, China).
• Online:2019-07-10 Published:2019-07-10

Abstract: Simple and practical cultivation practice with water saving and nitrogenreducing is beneficial to promoting the development of rice cultivation technology with resourceconserving and environmentfriendly. Taking production model as object, we examined the effects of watersaving and nitrogenreducing on annual yield, the characteristics of population quality, and nitrogen use efficiency of double cropping rice. The results showed that watersaving did not decrease annual yield of ratoon rice and double rice, with highest yield of 8.42 and 12.71 t·hm-2  for both rice modes under the treatment of watersaving irrigation (W3). Compared with no nitrogen application (N0), annual yield under the treatment of nitrogenreducing (N2) and local nitrogen application level (N1) was significantly increased, with no significant difference between the treatments of N1 and N2. In addition, nitrogen agronomy efficiency, nitrogen partial factor productivity, and nitrogen use efficiency under the N2 treatment was higher than those under the N1 treatment. Therefore, to ascertain irrigating or not by the observation of the water layer in the soil layer using simple and homemade PVC tube, with reducing 24% and 20% nitrogen application respectively in the models of both ratoon rice and double rice, can achieve dual reduction of water and nitrogen use. It is a simple and practical cultivation technology with watersaving and nitrogenreducing in the rice production model.