陕西渭南市卤阳湖土壤生产潜力分析  

Analysis of Soil Productivity Potential in Luyang Lake Area of Weinan Shaanxi

作　　者：慕小艳[1] 李新平[1] 李文斌[1] 吕世丽[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100

出　　处：《西北农业学报》2013年第4期165-171,共7页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：亚洲发展银行资助项目

摘　　要：为探讨卤阳湖项目区土壤的生产潜力,在对该区土壤理化性状分析的基础上,结合当地实际和已有的试验结果,采用潜力递减法研究和分析项目区内4种主要农作物和几种典型土壤的生产潜力及影响其发挥的限制因素,同时将盐分对土壤的影响纳入土壤修正系数中,并对其涉及到的温度、水分及土壤修正系数进行估算。结果表明,温度不是该地区作物和土壤生产潜力的主要限制因素,而盐分和水分是该区主要农作物土壤生产潜力发挥的主要限制因素。各类型土壤通过改良,生产潜力都有一定的上升空间,其中无盐化土壤仍然有一定的增产幅度,为3 659kg/hm2;重盐化土壤增产幅度最大,为9 057kg/hm2;其次为中盐化土壤,增产幅度为6 650kg/hm2;轻盐化土壤的增产幅度为5 199kg/hm2。土壤修正系数的获得和相关改良措施的提出为卤阳湖盐碱土的评价和合理开发提供科学依据。This experiment was conducted to investigate the soil potential productivity in the Luyang lake project area. Four main crops and several typical soils types were selected to study the soil poten- tial productivity as well as the limiting factors,considering the soil physical and chemical properties,a previous research results, and the local reality. The potential attenuation method was adopted in the research. The salt effect on the soil was included in the soil modification coefficients, and the tempera- ture, moisture and soil modification coefficients were estimated in the study. The results showed that. salt and water were the main limiting factors to the soil poten perature was not. The potentia productivity of each type soi ving,and severe salinization soil yield would increase most b salinization soil 6 650 kg/hm, ,next mild salinization soil 5 199 after improvement would still increase by 3 659 kg/hm2. The tial productivity in this area,while tem- 1 had some climbing space after impro- y 9 057 kg/hm2, followed by moderate kg/hm2; the yield of no salinization soil gain of related soil modification coeffi- eient and the proposal of improvement measures provided scientific basis for a rational evaluation and exploitation of the saline soils in Luyang lake.

关 键 词：卤阳湖 土壤 修正系数 生产潜力 

分 类 号：S158[农业科学—土壤学]