Effects of Irrigation and Nitrogen Fertilization on Rice Physiological Characters and Yield and Quality

摘要

The effects of irrigation model and Nitrogen (N) fertilization on rice evapotranspiration and yield were studied in an experiment of pool culture with in rain-proof shelter. Results showed that irrigation model and nitrogen fertilization had significantly influence on rice growth and photosynthetic capacity and yield and quality. Compared with the conventional irrigation, the plant height, rice water consumption, water requirement intensity and valid panicle number decreased and while water use efficiency, grain number perspike and seed setting rate in creased under control irrigation. With the in cement of N application rates, rice water consumption, water requirement intensity, effect panicle number and grain number per spikein creased, while setting-seed rate and 1000-grain weight decreased. Use the controllable irrigation technology, which had obvious effects of yield and quality on rice with the raise of N fertilizer rate. The yield reached 11489 kg/hm2 and 10126 kg/hm2 when the treatments was with 180 kg/Nhm2 and 270 kg/Nhm2, which was significantly higher than the treatment of CIN1and C2N1. The determination results showed that the palatability value of C1N2 was highest to 79.3, the cooking quality was improved. Then analyzed water and nitrogen fertilizer, yield and water use efficiency were highest at 180 kg/hm2 of N applied. We concluded that control irrigation model combined with suitable N application rate (180 kg/hm2) could benefit for rice production by reducing cost and gaining high yield.