关键词: 稻虾共作, 水稻（Oryza sativa L.）, 施肥现状

Abstract: The present situation of rice fertilization in Qianjiang city, a typical area of integrated rice-crayfish mode in Hubei province, was comprehensively analyzed and evaluated by means of sampling survey. The results showed that the average application rates of nitrogen （N）, phosphorus （P₂O₅） and potassium （K₂O） on rice （Oryza sativa L.） were 135.5 kg/hm², 59.5 kg/hm² and 68.5 kg/hm², respectively, which decreased by 27.4%, 34.2% and 32.0% compared with the base year, respectively. The application rates of N, P and K decreased by 8.0%, 12.5% and 9.6% compared with the previous year in the first five years of integrated rice-crayfish mode. Compared with the fifth year, the application rates of nitrogen, phosphorus and potassium decreased by 6.6%, 21.6% and 13.1% respectively in the sixth year and above, and 39.0%, 60.2% and 48.1% respectively compared with the base year. About half of the nitrogen, almost all of the phosphorus and most of the potassium in the rice shrimp intercropping model were applied as base fertilizer. With the extension of the integrated rice-crayfish mode, the proportion of total phosphorus and total potassium to total nitrogen also decreased. 72.5% to 82.1% of the farmers about integrated rice-crayfish mode chosed the method of one-time base fertilizer plus one tiller fertilizer, which was higher than that in the base year. 7.1% to 27.5% of farmers chosed to apply basal, tiller and spike fertilizer once, which was lower than 40.0% of the base year. 10.7% of the farmers about integrated rice-crayfish mode did not apply basic fertilizer, only tiller fertilizer and panicle fertilizer.

Key words: integrated rice-crayfish mode, rice（Oryza sativa L.）, fertilization status