关键词: 宁夏中部干旱带, 宁夏中部干旱带, 土壤可蚀性, 集沙量

Abstract:

Abstract: Xinjiang Province is one of the main regions where produce cotton and foodstuff in the country and its agriculture has been markedly affected by soil salinization for a long time, how to ameliorate these lands is a hotspot. Humic acid soil modifier FA was added to test soil for evaluating its effect on amelioration of heavy soda saline-alkali and low fertility cotton field, we measured soil electrical conductance, cotton growth and yield as screening means to study the effect of the FA on the improvement of saline-alkali soil and recommend dosage. Our results showed that: (1) FA Handilong had active effect on the soil moisture. The correlation analysis of application rate of FA and water retention performance of soil indicated that application rate of FA and water retention performance of soil have a positive correlation; (2)FA could reduce the salt contents and control the percentage of soil salt of 0-60 cm about 0.5 ms/cm; (3) Indicators such as plant height stem thickness, leaf area and field of cotton all increased as application rate of FA. Analyzed from yield, desalting effect, FA Handilong input costs and the economic benefit, FA could reduce the salt contents, increase yield, improve soil and enhance effects of water and soil conservation on saling cotton field. Its optimum application dose was in the range of 1500-2950.5 kg/hm2.