不同年龄等级枣园果实干重与土壤理化性质关系分析

Analysis of the relationship between fruit dry weight and soil physical and chemical properties in jujube orchards of different ages class

本试验通过采用实地调查结合室内分析的方法对新疆南疆不同年龄等级枣园果实干重与土壤理化性质之间的关系进行了研究,结果表明:(1)随着枣树年龄等级增长,单株红枣果实干重逐渐增加,受年龄等级影响,果实干重差异性显著。(2)不同年龄等级枣园土壤理化性质空间异质性表现不同,容重空间变异系数在2.81%~6.70%之间,属于弱变异,而全N含量属于强变异。土壤全盐量、含水量主要分布在0~40 cm、80~100 cm土层处。各年龄等级土壤全C、全N主要分布在表层。随着年龄等级增长,表层土壤容重呈逐渐增大趋势,土壤全P含量呈现出向表层聚集的现象。(3)各年龄等级单株果实干重与容重呈极显著正相关,与全C呈显著正相关。综上所述,在生产经营过程中应增施有机肥、深施氮肥,低年龄等级枣园应适当增施磷肥。

In this experiment,the relationship between fruit dry weight and soil physical and chemical properties of jujube orchards of different ages class in Southern Xinjiang was studied through on-the-spot investigation combined with indoor analysis.The results showed that:(1)With the increase of jujube tree age class,the fruit dry weight per plant gradually increased,and the dry difference was significant.(2)The spatial heterogeneity of soil physical and chemical properties was different in jujube orchards of different ages class.The spatial coefficient of bulk density was between 2.81%-6.70%,which was weak variation,while the content of total N was strong variation.The total salt and water content of the soil were mainly distributed in the 0-40 cm and 80-100 cm soil layers.The content of total C and total N in soils of all ages class jujube orchards were both mainly distributed in the surface layer.With the increase of age class,the bulk density of the surface soil gradually increased,and the total P content of the soil showed a phenomenon of aggregation to the surface layer.(3)There was a significant positive correlation between fruit dry weight and bulk density at all age class group,and significantly positively correlated with the whole C.In the process of production and operation,organic fertilizer and deep nitrogen fertilizer should be added,and phosphorus fertilizer should be appropriately applied to jujube orchards of young age class.