Distribution of Nutrients in Arable Land Soil of Western Hainan  

海南西部土壤养分分布特征（英文）

作　　者：王华[1] 冯焕德[1] 王荣香[1] 

机构地区：[1]中国热带农业科学院热带作物品种资源研究所,海南儋州571737

出　　处：《Agricultural Science & Technology》2016年第10期2390-2393,共4页农业科学与技术（英文版）

摘　　要：[Objective] This study aimed to reveal distribution characteristics of soil nutrients in tropical farmland, thereby providing a reference for cropland management and balanced fertilization in the tropical area. [Method] Combining field survey and laboratory analysis, distribution status of nutrients in arable land of Baisha Li Autonomous County of Hainan Province was investigated. [Result] The soil in Baisha Li Autonomous County was acidic in overall with average pH value of 5.0. it had medium organic matter level （average of 19.3 g/kg） and rich alkali-hydrolyzable nitrogen content, but was lack of available phosphorus and available potassium. The spatial distribution of available nitrogen, available phosphorus and available potassi- um in the soil was uneven. The spatial distribution of soil nutrients was mainly related to soil parent materials of the investigated area and pH value of the investigated soil. [Conclusion] According to the distribution characteristics of nutrients in the soil, awareness of land use and land maintenance should be strengthened, application amount of organic fertilizers should be increased, chemical fertilizers should be applied rationally, and fertilization structure should be optimized in the future.[目的]阐明热带农田土壤养分含量规律,为热区耕地管理和平衡施肥提供参考。[方法]以海南白沙黎族自治县为研究区,采用野外调查、室内分析相结合的方法 ,阐明区内耕地土壤养分现状,分析其养分分布特征。[结果]白沙县土壤总体呈酸性,其p H均值为5.0,土壤有机质含量为中等水平,其含量均值为19.3 g/kg;土壤有效磷和速效钾含量较为缺乏,土壤碱解氮含量丰富,且土壤有效氮、磷、钾含量空间分布不均。土壤养分含量空间分布主要与区内的成土母质、土壤p H分布有关。[结论 ]据土壤养分含量特征,今后应增强用地养地意识,增施有机肥,合理施用化肥,优化施肥结构。

关 键 词：FARMLAND Soil nutrients Tropical area Nutrient balance 

分 类 号：S158[农业科学—土壤学]