摘要
对新化县2007~2016年稻田耕层土壤pH值、有机质、有效磷和速效钾养分含量现状进行了调查,并与1987年第二次土壤普查数据进行了对比分析。结果表明,新化县稻田耕层土壤酸化趋势明显,pH值平均值为5.6;处于强酸性状态的稻田面积大幅增加,占比较第二次土壤普查提高了36.0个百分点。耕层土壤有机质含量增加,平均值为37.2 g/kg;耕层土壤中有效磷大幅提升,平均值为13.72 mg/kg;耕层土壤速效钾平均含量74.3 mg/kg。从总体上看,新化县稻田当前土壤肥力状况与全国水稻土变化趋势一致,土壤酸化加剧,有机质与速效钾含量稳定增长,有效磷由大面积缺乏向过量累积方向发展,且养分间存在发展不平衡现象。
The status of soil pH value,organic matter,available phosphorus and available potassium were investigated in paddy field from2007to2016,and contrastively analyzed with the data measured in the second national soil surveys in1987in Xinhua County.The results showed that soil acidification effect were obvious during these30years in paddy field in Xinhua County.The average soil pH value was5.6.The area of strongly acidic paddy field increased obviously by36.0%compared with the value in the second national soil surveys.Average soil organic matter in the survey increased to37.2g/kg,the average soil available phosphorus was13.72mg/kg,and average soil available potassium was74.3mg/kg.In general,the variation trend of soil pH value and available nutrients in paddy field of Xinhua County were in correspondence with the state of China characterized of intensified soil acidification,soil organic matter and available potassium stably increasing,excessive accumulation trend of soil available phosphorus,and problem of unbalance among soil nutrients.
作者
康六生
刘林
陈武忠
鲁艳红
孙玉桃
廖育林
KANG Liu-sheng;LIU Lin;CHEN Wu-zhong;LU Yan-hong;SUN Yu-tao;LIAO Yu-lin(Agricultural Bureau of Xinhua County , Xinhua 417600, PRC;Hunan Soil and Fertilizer Research Institute, Changsha 410125, PRC;Scientific Observing and Experimental Station of Arable Land Conservation (Hunan), Ministry of Agriculture, Changsha 410125, PRC)
出处
《湖南农业科学》
2017年第8期27-30,36,共5页
Hunan Agricultural Sciences
基金
全国测土配肥施肥项目(2016)
国家自然科学基金项目(41401340)
湖南省自然科学基金项目(2016JJ6063)
关键词
水稻土
PH值
有效养分
变化
新化县
paddy soil
pH value
available nutrient
variation
Xinhua
