摘要
【目的】探明贵州省印江县茶树种植区与非种植区耕地土壤pH和主要养分的差异,为印江县土地资源的合理利用及茶树种植的科学布局提供参考。【方法】以印江县耕地土壤为研究对象,采用野外调查与室内分析相结合的方法,测定耕地土壤pH、全氮(TN)、全磷(TP)、全钾(TK)、碱解氮(AN)、有效磷(AP)、速效钾(AK)和有机质(OM)共8个养分指标的含量,并对其土壤养分分布特征进行统计分析。【结果】印江县耕地土壤pH平均值为5.97,偏酸性。土壤TN和TK较丰富至丰富的占比分别为54.13%和71.18%,表现丰富;AN、AK和OM中等至丰富分别占59.39%、63.87%和68.29%,表现中等偏丰富;TP和AP较缺乏至缺乏分别占61.18%和60.26%,表现较缺乏。AN与TN、AP与TP和AK与TK均呈正相关关系,其相关系数依次为AN(R^(2)=0.435)>AP(R^(2)=0.273)>AK(R^(2)=0.005)。其中,平坝区耕地土壤OM、AN、AP和AK含量均较高,分别为26.68 g/kg、122.13 mg/kg、26.94 mg/kg和138.05 mg/kg,较其他区具有明显优势。与印江县背景值比,茶树种植区除OM外,其他养分指标均较背景值高。耕地撂荒区土壤AN、AK和AP较缺乏至缺乏占比较大,分别为56.81%、84.10%和35.23%。【结论】印江县耕地土壤养分分布不平衡,偏酸性;平坝区耕地土壤养分状况整体较优,绝大部分耕地适宜种植茶树。
【Objective】The variation in pH and major nutrients of soils in tea-growing and non-tea-growing areas is discussed to provide the scientific basis for rational utilization of land resources and scientific layout of tea cultivation in Yinjiang County.【Method】The distribution characteristics of soil nutrients is analysed by determining pH and TN,TP,TK,AN,AP,AK and OM content of cultivated land based on field survey and indoor analysis in Yinjiang County.【Result】The average pH of cultivated land is 5.97 with slight acidic in Yinjiang County.The proportion of soils with relatively abundant+abundant TN and TK level accounts for 54.13%and 71.18%separately.The proportion of soils with moderate+relatively abundant+abundant AN,AK and OM level is 59.39%,63.87%and 68.29%respectively.The proportion of soils with relatively deficient+deficient TP and AP level is 61.18%and 60.26%separately.There are the positive correlations between AN and TN,between AP and TP,and between AK and TK.The correlation coefficient is AN(R^(2)=0.435)>AP(R^(2)=0.273)>AK(R^(2)=0.005).The OM,AN,AP and AK content of cultivated land in flatland area is 26.68 g/kg,122.13 mg/kg,26.94 mg/kg and 138.05 mg/kg respectively and obviously higher than other areas.The TN,TP,TK,AN,AP and AK content of cultivated land in tea-growing area is higher than the background value in Yinjiang County.The proportion of soils with relatively deficient+deficient AN,AK and AP level in abandoned area is 56.81%,84.10%and 35.23%respectively.【Conclusion】There is unbalance in soil nutrients distribution of cultivated land with slight acidic in Yinjiang County.The soil nutrient status of cultivated land in flatland area is comparative superiority and most of cultivated land is suitable for tea cultivation.
作者
李永刚
石睿
饶红娟
张翼
王文杰
洪万华
LI Yonggang;SHI Rui;RAO Hongjuan;ZHANG Yi;WANG Wenjie;HONG Wanhua(101 Geological Brigade,Guizhou Bureau of Geology and Mineral Exploration and Development,Kaili,Guizhou 556004;103 Geological Brigade,Guizhou Bureau of Geology and Mineral Exploration and Development,Tongren,Guizhou 554300,China)
出处
《贵州农业科学》
CAS
2023年第1期20-27,共8页
Guizhou Agricultural Sciences
基金
贵州省地质矿产勘查开发局地质科研项目“梵净山北西部茶叶区土壤地球化学特征及特色化建议研究”[黔地矿科合(2019)3]
黔东南州科技计划项目“黔东南州岩溶区场地土壤污染物迁移规律研究”[黔东南科合J字(2020)062]。
关键词
耕地
茶树种植
土壤养分
印江
贵州
cultivated land
tea planting
soil nutrient
Yinjiang
Guizhou
