关键词：
宁夏枸杞;GIS;不同树龄;惠农;中宁;全氮;有机质;有效钾;有效磷
摘 要：
宁夏枸杞生产中施肥不合理,造成枸杞产量下降,土壤板结,氮、磷富集,树体早衰落叶等严重后果。结合GPS对中宁和惠农不同树龄枸杞产地进行‘S’形多点、混合土样采集,应用地统计学和ArcGIS技术对宁夏枸杞主产区——惠农和中宁不同树龄枸杞产地土壤肥力等级分布情况进行了研究。结果表明:5年以下树龄枸杞产地的土壤全氮含量等级为0.9~1.5g·kg~(-1),有机质含量等级为10.0~15.0g·kg~(-1),有效钾含量等级主要为<200mg·kg~(-1)和>300mg·kg~(-1),有效磷含量等级主要为<50.0mg·kg~(-1)和80.0~120.0mg·kg~(-1)。土壤供钾和磷能力差距较大,需要增施有机肥,提高该区土壤缓冲性能和保肥能力。惠农6~9年树龄的土壤全氮含量<1.5 g·kg~(-1),有机质含量<15.0g·kg~(-1),等级均要略低于中宁,供氮能力弱于中宁;惠农和中宁10年以上树龄枸杞的土壤全氮含量与有机质含量等级基本相同,分别为0.9~2.0 g·kg~(-1)和>10.0g·kg~(-1),供氮能力均较强。惠农6~9年树龄枸杞的土壤有效钾含量<250mg·kg~(-1),有效磷含量<50.0mg·kg~(-1),等级要略低于中宁,而惠农10年以上树龄的土壤有效钾含量>200mg·kg~(-1),有效磷含量<80.0mg·kg~(-1),等级要低于中宁。惠农6年以上树龄枸杞产地的土壤供钾及供磷能力均弱于中宁,中宁10年以上树龄枸杞的土壤供磷能力最强,磷肥需求相对最少。
译 名：
Soil Fertility Characteristics of Wolfberry With Different Planting Ages in Main Producing Areas in Ningxia Based on GIS and Geostatistics
作 者：
LI Feng;LI Yinkun;Institute of Agricultural Economy and Information Technology,Ningxia Academy of Agriculture and Forestry Sciences;Beijing Research Center of Information Technology in Agriculture;
单 位：
Institute of Agricultural Economy and Information Technology,Ningxia Academy of Agriculture and Forestry Sciences%Beijing Research Center of Information Technology in Agriculture
关键词：
Ningxia wolfberry;;GIS;;different planting ages;;Huinong district;;Zhongning county;;total nitrogen;;organic matter;;available K;;available P
摘 要：
A series of serious consequences had been caused by unreasonable fertilization in Ningxia wolfberry production,including decline of wolfberry production,soil hardening,enrichment of nitrogen and phosphorus,tree leaves premature senility and so on.Combined with GPS,soil samples were collected by the ‘S'shaped multi-point and mixed form.Based on geostatistics and ArcGIS,distribution of soil fertility level of wolfberry with different planting ages in Huinong district and Zhongning county of Ningxia was studied.The results showed that the soil total nitrogen content level of 5 years old wolfberry origin was 0.9-1.5 g·kg~(-1) and the soil organic matter content level was 10.0-15.0 g·kg~(-1).Most of the soil available K content level was<200 mg·kg~(-1) or>300 mg·kg~(-1) and the soil available P content level was<50.0 mg·kg~(-1) or 80.0-120.0 mg·kg~(-1).The soil potassium and phosphorus supplying capacity had a big gap and much more organic fertilizer needed to be applied to improve the soil buffering ability and fertility preserving capacity.The soil total nitrogen level of6-9 years old wolfberry origin in Huinong was <1.5 g·kg~(-1) and the soil organic matter level was<15.0 g·kg~(-1),a little lower than that of Zhongning.And also the soil total nitrogen supplying capacity and fertility preserving capacity were slightly weaker than that of Zhongning.The soil total nitrogen and organic matter level of above 10 years old wolfberry origin in Huinong were the same as in Zhongning,with the contents of 0.9-2.0 g·kg~(-1) and>10.0 g·kg~(-1) respectively.The soil ability of nitrogen supplying capacity and fertility preserving capacity were stronger.The soil available K level of6-9 years old wolfberry origin in Huinong was <250 mg·kg~(-1) and the soil available P level was<50.0 mg·kg~(-1),slightly lower than that of Zhongning.The soil available K level of above 10 years old wolfberry origin in Huinong was > 200 mg· kg~(-1) and the soil available P level was<80.0 mg·kg~(-1),lower than that of Zhongning.The soil potassium and phosphorus supplying capacity of above 6 years old origin in Huinong was weaker than that of Zhongning.The soil phosphorus supplying capacity of above 10 years old wolfberry origin in Zhongning was the strongest and its′requirement of phosphate fertilizer was the fewest.In this study,theoretical basis and data support were provided for the reasonable fertilization of wolfberry with different planting ages in Huinong district and Zhongning county of Ningxia.
