山核桃品质对产地土壤养分的空间响应

【目的】研究山核桃品质与对应产地土壤养分含量的相关性，了解土壤中养分元素含量对山核桃品质的影响，为山核桃合理布局和科学管理提供依据。【方法】以典型产区临安为研究区域，采集了153个山核桃样品及其对应土壤样品，采用地统计学方法和GIS空间分析技术，分析山核桃品质与产地土壤养分含量状况，探究山核桃及其产地土壤中大量及微量元素的空间分布特征和变异规律以及空间对应关系。【结果】相关系数结合交叉相关函数分析，发现土壤中各养分元素与果实品质元素之间均存在不同程度相关关系，其中果实氮与土壤碱解氮、有效磷、速效钾、有效锌、有效锰的相关关系较强；磷与土壤有效磷、有效硼、有效锰、有效锌的相关关系较强；钾与土壤速效钾、有效硼、有效铁、有效锌的相关关系较强；粗脂肪与土壤有效磷、有效硼、有效锌的相关关系较强。空间分析结果显示，临安各乡镇土壤大量及微量元素含量空间异质性明显，而山核桃果实中钾和粗脂肪空间异质性不明显，氮、磷的空间变异性明显，大致呈现西北地区低东南地区高的分布趋势。【结论】山核桃品质受土壤中磷、硼、锌三种元素影响较大。山核桃与土壤相应养分元素的空间分布格局具有一定相似性，尤其是高低值区域。岛石镇西部和南部、湍口镇、河桥镇、太阳镇及昌化镇南部的土壤养分元素和山核桃品质元素含量相对较高，昌化镇北部、清凉峰镇西部、龙岗镇北部的土壤养分元素和山核桃品质元素含量相对较低。

Spatial response of Carya cathayensis quality to soil nutrients

【Objectives】Study of the relationship between Carya cathayensis and soil nutrients will provide scientific reference for the nutrient management and rational distribution of Carya cathayensis.【Methods】Lin’an, a typical producing area of Carya cathayensis, was selected as the research area, and soil and Carya cathayensis samples were taken in 153 sites across the area. The contents of nutrients in the soil of production area were analyzed using geostatistics and GIS spatial analysis technology, and the variation of macro- and micro-elements in the soil and its production area were explored to understand the distribution characteristics, variation and spatial correspondence.【Results】The correlation coefficients and cross correlation function analysis showed that there were different degrees of correspondence between soil nutrients and fruit quality. Among them, the fruit N was significantly correlated with soil available N, P, K, Zn and Mn; the fruit P was significantly correlated with soil available P, B, Mn and Zn; and the fruit K was significantly correlated with soil available K, B, Fe and Zn. The crude fat of fruit was significantly affected by soil available P, B, Zn. The contents of soil macro- and micro-nutrients in Lin’an varied significantly among the surveyed sites. The fruit K and crude fat contents were relatively consistent across the area, while the fruit N and P contents varied significantly, showing a trend of increasing from the northwest to the southeast of Lin’an, especially for N, in which the spatial variation was significant.【Conclusions】The nutrition quality of Carya cathayensis fruit and soil nutrients show similar spatial correspondence, and the fruit quality of Carya cathayensis is significantly affected by soil available P, B, and Zn contents. In general, the soil nutrient contents and Carya cathayensis quality in the west and south of Daoshi Town, Tuankou Town, Heqiao Town, Taiyang Town and south Changhua Town were relatively high, while those in the north Changhua Town, west Qingliangfeng Town and north Longgang Town were relatively low.