北京林业大学学报2018，Vol.40Issue(2)：51-57,7.DOI:10.13332/j.1000-1522.20170218
天然沸石对松嫩平原黑钙土理化性质和保水能力的影响
Effects of natural zeolite on physical and chemical properties and water retention capacity of chernozem in Songnen Plain of northeastern China
摘要
Abstract
[Objective] To study the effects of natural zeolite on modifying the water retention capacity of chernozem and provide theoretical reference for the improvement of soil water retention, the effects of natural zeolite on the physical and chemical properties of chernozem in Songnen Plain of northeastern China and soil water characteristic curve were studied. [Method] Chernozem was modified by natural zeolite, cultured in a pot for 60 days. The soil bulk density was measured by cutting ring method. Soil total porosity, capillary porosity and aeration porosity were calculated by formula method. Determination of soil water characteristic curve was measured by centrifuge test. [Result] The results showed that there was a positive correlation between soil bulk density and the amount of natural zeolite, soil bulk density increased with the increasing amount of nature zeolite. Soil bulk density increased significantly at the 10% mixing amount of natural zeolite. However, there was a negative correlation between the capillary porosity and total porosity and the amount of natural zeolite, the capillary porosity and total porosity decreased with the increasing amount of natural zeolite. The maximum ventilation porosity was obtained at the 10% mixing amount of natural zeolite. The result of the water retention capacity of different mixing amount of natural zeolite was: 20% natural zeolite (NZ) > 15% NZ≈10% NZ > 5% NZ > CK. The soil water characteristic curve of each group can be fitted well by Gardner model. The coefficients a and b of water characteristic curve equation were negatively correlated with water holding capacity, and positively correlated with saturated water content. The saturated water content and the fitting coefficient a were fitted too. The results showed that R2 is 0. 9418. [Conclusion] It is feasible and economical to improve water retention capacity of chernozem by 10% mixing amount of natural zeolite. The saturated water content is high, the initial level of water characteristic curve is not necessarily high yet. The results show that the water retention properties of chernozem can be effectively improved by mixing natural zeolite. This study provides a theoretical and experimental reference for soil improvement in chernozem.关键词
黑钙土/土壤改良/保水性/天然沸石Key words
chernozem/soil improvement/water retention property/natural zeolite分类
农业科技引用本文复制引用
马媛媛,戴显庆,彭绍好,杨光,冀晓东..天然沸石对松嫩平原黑钙土理化性质和保水能力的影响[J].北京林业大学学报,2018,40(2):51-57,7.基金项目
中央高校基本科研业务费专项(2015ZCQ-SB-01、2016JX04). （2015ZCQ-SB-01、2016JX04）
