水土保持学报2017，Vol.31Issue(4)：277-284,8.DOI:10.13870/j.cnki.stbcxb.2017.04.044
横垄覆膜对丹江口库区土壤净氮矿化的影响
Effects of Cross Ridge Covered with Plastic Film on Soil Net Nitrogen Mineralization in Danjiangkou Reservoir Area, China
摘要
Abstract
A field plot experiment was conducted to explore the effects of cross ridge covered with plastic film on soil net nitrogen mineralization in Wulongchi small watershed during maize growing period.Results showed that the soil net nitrogen mineralization contents under cross ridge covered with plastic film were significantly lower than those of non-mulched treatment at the mid-term stage of seedling and the early stage of jointing,and the decreases were 7.8％～57.0％ and 2.2％～52.8％,respectively.While at the later stage of jointing,heading stage and maturity stage,the former were significantly greater than the latter and the increases were 352.9 ％ ～ 703.3 ％,52.5 ％ ～ 311.0％ and 15.2 ％ ～ 334.8 ％,respectively.The higher correlations existed between the soil net nitrogen mineralization contents under cross ridge covered with plastic film and the soil moisture,temperature and total nitrogen contents at the seedling stage,jointing stage,heading stage and maturity stage (0.6＜Grey correlation degree≤0.8).The soil net nitrogen mineralization contents under cross ridge covered with plastic film showed a significant linear relationship,with soil temperature at the seedling stage (F=7.205,P=0.023),with soil moisture and temperature at the jointing stage (F=36.861,P=0.001),and with soil moisture at the maturity stage (F=42.438,P=0.007).关键词
横垄覆膜/土壤净氮矿化/树脂芯培养法/丹江口库区Key words
cross ridge covered with plastic film/soil net nitrogen mineralization/resin core culture method/Danjiangkou Reservoir分类
天文与地球科学引用本文复制引用
于兴修,王伟,胡砚霞,汉强,徐苗苗,任瑞,张家鹏..横垄覆膜对丹江口库区土壤净氮矿化的影响[J].水土保持学报,2017,31(4):277-284,8.基金项目
国家自然科学基金项目“垄作覆膜对土壤无机氮流失过程的影响机理”(41471227) （41471227）
湖北省自然科学基金项目“丹江口库区土地利用变化对营养盐输出影响研究”(2016CFB201) （2016CFB201）
