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当前位置: 首页 > 文章 > 不同土类土壤养分空间变异与施肥策略研究 扬州大学学报(农业与生命科学版) 2011,32 (2) 42-47
Position: Home > Articles > Study on spatial variability of soil nutrients in different soil groups and fertilization strategy Journal of Yangzhou University(Agricultural and Life Science Edition) 2011,32 (2) 42-47

不同土类土壤养分空间变异与施肥策略研究

作  者：
高辉;张洪程;邢琳;王云;朱德进;严桂珠
单  位：
扬州大学江苏省作物遗传生理重点实验室/农业部长江中下游作物生理生态与栽培重点开放实验室;姜堰市农业局
关键词：
土类;土壤养分;空间变异;地统计学;空间分布图;施肥策略
摘  要：
运用地统计学与空间插值方法,对江苏省姜堰市2个代表性潮土、水稻土的研究区,运用GPS定位分别测定其耕作层(0~20 cm)104、130个土样的有机质、全氮、碱解氮、速效磷、速效钾含量和pH值,并进行不同土类土壤养分空间变异与施肥策略研究。结果表明:①水稻土有机质、全氮、碱解氮、速效磷、速效钾含量均高于潮土,pH值两者接近;2种土类中土壤速效磷变异系数最大,其次是速效钾,pH最小。②除潮土土壤pH外,2种土类土壤养分要素均为中等空间相关性。潮土每1个土壤取样点的测定数据可在半径254.9 m的空间域(20.4 hm2)有效;而水稻土则在半径339.6 m的空间域(36.2 hm2)有效。③运用空间插值技术,生成土壤养分空间分布面状图,获得研究区范围内任意点的土壤有机质、速效磷、速效钾等含量及其供肥水平,进而提出了农田尺度精确施肥的策略。
译  名：
Study on spatial variability of soil nutrients in different soil groups and fertilization strategy
作  者：
GAO Hui1,ZHANG Hong-cheng1,XING Lin1,WANG Yun1,ZHU De-jin2,YAN Gui-zhu2(1.Key Lab of Crop Gen and Physiol of Jiangsu Prov/Key Lab of Crop Physiol,Eco and Cult in Mid and Low Reaches of Yangtse Riv of MOA,Yangzhou Univ,Yangzhou 225009,China;2.Agric Bur of Jiangyan City of Jiangsu Prov,Jiangyan 225529,China)
关键词：
soil group;soil nutrient;spatial variability;geostatistics;space distribution map;fertilization strategy
摘  要：
With the methods of geostatistics and spatial interpolation,the spatial variability of fertility variables and fertilization strategy in paddy and fluvo-aquic soils in Jiangyan city(Jiangsu province) were studied.Total number of 104(for fluvo-aquic) and 130(for paddy) soil samples were collected from surface soils(0—20 cm).The sampling spots were positioned with a GPS machine.Organic matter(OM),total nitrogen(TN),alkali-hydrolyzable nitrogen(AHN),available phosphorous(AP),available potassium(AK) and pH value of the samples were measured.Results were as follows:(1) The contents of OM,TN,AHN,AP and AK were higher in paddy soils than those in fluvo-aquic soils whereas pH was not different.AP showed the largest variation coefficiency,whereas-coefficiency-of AK was the next and that of pH was the least between two types of soils.(2) Except the fluvo-aquic soil pH,all nutrient elements in two soil types had the moderate spatial correlation.The measured soil fertility variables from each sampling spot represented land space of 20.4 ha and 36.2 ha for fluvo-aquic and paddy soils respectively.(3) Using the spatial-interpolation-approach,spatial distribution of soil nutrients was mapped,which showed fertility levels of any spots of soils.Based on the analysis shown above,a strategy for field-scaled precise fertilization was proposed.

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