关键词: 棉花, 含氨基酸液体肥, 土壤盐分, 经济效益

Abstract: This paper studied the effects of applying bio-organic fertilizer combined with different kinds of chemical fertilizer on dry matter, yield, economic benefit of cotton and soil salt content by field experiment of drip irrigation under water and fertilizer integrated film. There were 5 treatments in the test: no fertilization (CK), conventional chemical fertilizer, fertilizer specially for drip irrigation, conventional chemical fertilizer + bio-organic fertilizer, and fertilizer specially for drip irrigation + bio-organic fertilizer. The results showed that the number of bolls per plant, single boll weight and yield of fertilizer specially for drip irrigation + bio-organic fertilizer treatment were increased by 5.0%, 1.2% and 6.3%, respectively, compared with the treatment of applying fertilizer specially for drip irrigation. The yield of conventional chemical fertilizer + bio-organic fertilizer treatment was 7.7% higher than that of the conventional chemical fertilizer treatment. Soil pH of adding bio-organic fertilizer treatments were lower than that of treatment without using bio-organic fertilizer. At 0~20 cm soil layer, the soil conductivity for sampling site 0 cm away from the drop point was lower than that of 30 cm away from the drop point. The drip irrigation could inhibit surface soil salinity. Combined application of biological organic fertilizer could effectively increase the number of bolls per plant, single boll weight and yield, and adjust soil pH, but could not control the soil salinity effectively. From the perspective of economic benefit maximization, the best fertilization model was conventional chemical fertilizer + bio-organic fertilizer. This study could offer references for integrated application of water, chemical fertilizer, and bio-organic fertilizer under film in cotton field of Northern Xinjiang.

Key words: cotton, liquid fertilizer containing amino acid, soil salinity, economic benefit