摘要
为了摸清黑龙港平原东北部土壤养分含量水平、分布特征,解决现阶段存在的施肥管理不科学现象,本文以黑龙港平原东北部17个县为研究对象,运用GIS技术,选取与粮食生产相关性高的土壤有机质、全氮、有效磷、速效钾、缓效钾等因子为研究指标,研究土壤养分空间变异特征。结果表明:有机质、全氮、速效钾、缓效钾变异系数范围为28.65%~45.26%,均属中等变异性,有效磷变异系数为119.21%,属强变异性。有机质、全氮、有效磷、速效钾具有强烈的空间相关性,缓效钾具有中等空间相关性。空间上有机质含量分布较为零散,基本呈现由西向东递减的规律;全氮和缓效钾高值区零星分布在西部、东部,低值区分布在北部、南部;有效磷和速效钾高值区均分布在西部、北部和东部,大体呈环状分布,并向中部递减;总体来看,研究区大部分区域土壤养分含量较为适当。土壤养分相关性分析显示有机质、全氮、有效磷、速效钾、缓效钾之间均呈极显著的正相关性,说明不同土壤养分的含量会对土壤其它养分含量的空间变异造成影响。
In order to find out the soil nutrient content and distribution characteristic in the northeast area of Heilonggang plain and solve the problem of unscientific fertilizer management at the present stage,17 countries in the northeast area of heilonggang plain were taken as the research object.Factors that are highly correlated with food production,including the soil organic matter,total N,available P,available K and slowly available potassium,were taken as the research indices to study the spatial variability of soil nutrients.The research results showed that the coefficient of variation of organic matter,total nitrogen,available potassium and slowly available K ranged from 28.65%to 45.26%,belonging to medium variability.The variation coefficient of effective phosphorus was 119.21%,belonging to the strong variability.Organic matter,total N,available P and available K had strong spatial correlation and slowly available potassium had medium spatial correlation.The space distribution of organic matter was relatively fragmented,showing the decreasing law from west to east.The high contents of total N and slowly available K were distributed in the west and east area,and low contents were in the north and south area.The effective phosphorus and available potassium were highly distributed in the west,north and east area,generally showing a circular distribution,and declining toward the central area.Overall,the soil nutrient contents in most study area was appropriate.Soil nutrient correlation analysis showed that organic matter,total N,available P,available K and slowly available potassium were significantly positive correlated,indicating that different soil nutrient contents could affect the special variation of other soil nutrient contents.
作者
刘赞
王红
李旭光
周大迈
张瑞芳
LIU Zan;WANG Hong;LI Xuguang;ZHOU Damai;ZHANG Ruifang(College of Agronomy,Hebei Agricultural University,Baoding 071001,China;Institute of Mountain Area in Hebei Province/National Engineering Research Center for Agriculture in Northern Mountainous Areas,Hebei Agricultural University,Baoding 071000,China;Hebei Soil Fertilizer General Station,Shijiazhuang 05000,China)
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2019年第5期96-102,共7页
Journal of Hebei Agricultural University
基金
国家重点研发计划项目(2018YFD0300507)
关键词
黑龙港平原
土壤养分
空间变异
养分等级
Heilonggang plain
soil nutrients
spatial variation
nutrient levels
