摘要
为了明确三峡库区典型柑橘园土壤pH、有机质及全氮的丰缺及其分布特征,采集了忠县全县域柑橘园土壤样品695份,检测了土壤pH、有机质和全氮含量状况;同时,针对忠县主要柑橘种植乡镇进行问卷调查,收集有效问卷217份,以明确不同管理方式对土壤有机质及全氮的影响。结果表明,25.47%柑橘园土壤pH低于5.5,19.42%柑橘园土壤pH为5.5~6.5,35.97%的柑橘园土壤pH大于7.5;45.75%柑橘园土壤有机质含量小于15 g/kg,48.78%柑橘园土壤有机质为15~30 g/kg,5.47%柑橘园土壤有机质大于30 g/kg;51.37%柑橘园土壤全氮小于1.0 g/kg,36.69%柑橘园土壤全氮为1.0~1.5 g/kg,11.94%柑橘园土壤全氮大于1.5 g/kg。柑橘园不同管理方式可以明显影响土壤碳氮状况,绿肥覆盖和有机肥施用可以分别提高土壤有机质8.71%和16.90%,且可以分别提高土壤全氮11.25%和18.52%。因此,适量有机肥和种植绿肥结合的方式是提高果园有机质和全氮的重要措施。
In order to clarify the soil pH,the abundance and distribution characteristics of organic matter,and total nitrogen in typical citrus orchards in the Three Gorges Reservoir area,695 soil samples from citrus orchards in Zhong County were collected to detect the status of soil pH,organic matter,and total nitrogen;At the same time,a questionnaire survey was conducted in the main citrus-growing towns in Zhong County,and 217 valid questionnaires were collected to clarify the impact of different management methods on soil organic matter and total nitrogen.The results showed that the soil pH of 25.47%citrus orchards was lower than 5.5,19.42%of citrus orchards had soil pH of 5.5~6.5,and 35.97%of citrus orchards had soil pH greater than 7.5;45.75%of citrus orchards had soil organic matter content of less than 15 g/kg,and 48.78%of citrus orchard soil was 15~30 g/kg,5.47%citrus orchard soil organic matter was greater than 30 g/kg;51.37%citrus orchard soil total nitrogen was less than 1.0 g/kg,36.69%citrus orchard soil total nitrogen was 1.0~1.5 g/kg,11.94%citrus orchard soil total nitrogen was greater than 1.5 g/kg.Different management methods of citrus orchards could significantly affect the soil carbon and nitrogen status.Green manure mulching and organic fertilizer application could increase soil organic matter by 8.71%and 16.90%,respectively,and ould increase soil total nitrogen by 11.25%and 18.52%,respectively.Therefore,the combination of appropriate amount of organic fertilizer and planting green manure is an important measure to improve the organic matter and total nitrogen of the orchard.
作者
詹鹏杰
邓茂林
石孝均
张跃强
陈志蕙
旷德姣
刘正兰
张宇亭
Zhan Pengjie;Deng Maolin;Shi Xiaojun;Zhang Yueqiang;Chen Zhihui;Kuang Dejiao;Liu zhenlan;Zhang Yuting(School of Resources and Environment,Southwest University,Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin,Beibei,Chongqing 400715,China;Chongqing Zhong County Agriculture and Rural Committee,Zhong county,Chongqing 404300,China)
出处
《山地农业生物学报》
2022年第2期13-19,共7页
Journal of Mountain Agriculture and Biology
基金
国家自然科学基金项目(31902116)。
关键词
忠县
柑橘
土壤有机质
土壤全氮
Zhong county
citrus
soil organic matter
soil total nitrogen
