怀涿葡萄产区土壤过氧化氢酶活性空间分布规律及影响因素分析

为了探明影响土壤过氧化氢酶活性空间变异规律的葡萄品种、土壤物理、化学因素及其内在关系,本文利用GIS和地统计学分析方法研究了怀涿葡萄产区(河北省怀来、涿鹿两县)的83个表层土壤样品。结果表明:怀涿葡萄产区表层土壤过氧化氢酶活性表现出较强烈的空间相关性,其变异规律呈现出明显的区域差异分布特征,土壤过氧化氢酶活性的最佳空间拟合模型为指数模型;土壤中大量元素(除K外)、中量元素、微量元素、重金属元素和一些有益元素(V、I)均对土壤过氧化氢酶活性表现出了显著或极显著的活化作用。在当地传统的土壤葡萄体系管理模式下,土壤过氧化氢酶活性的空间变化规律与土壤不同空间位点的大多数化学元素含量变异分布特点密切相关;土壤过氧化氢酶活性与细粉粒含量呈显著正相关,与土壤黏粒含量呈极显著正相关,可以认为物理性黏粒尤其是黏粒和细粉粒含量是影响怀涿葡萄产区表层土壤过氧化氢酶活性空间变异特征的另一个重要因素。而葡萄品种和土壤pH对土壤过氧化氢酶活性影响较小,与土壤过氧化氢酶活性的空间分布规律关系不大。

Spatial variability and influencing factors of soil catalase activity in grapevine fields in Huailai-Zhuolu Basin

This study assessed the physicochemical factors influencing the spatial variability of soil catalase activity in grapevine fields. 83 samples of 0~20 cm soil layer was collected from grapevine fields in the Huailai-Zhuolu basin (HZB) of Hebei, China. Geostatistics and GIS environments were used to analyze the spatial variability of soil catalase activity for different combinations of grape variety and soil property. Also the contributing factors to enzyme activity were analyzed. The results showed strongly spatial correlation of catalase activity in 0~20 cm soil layer of grapevine field in HZB. The variations of catalase activity in the study area tracked a zonal distribution, gradually decreasing from west to east along river courses. Based on semi-variance analysis, the best-fitted model for soil catalase activity distribution in the study area was an exponential model. With the exception of potassium, all macro-elements, micro-elements, quantitative elements, heavy metals and other beneficial elements had a significant positive activation effect on soil catalase activity in grapevine fields. In traditional soil-grape cropping systems, catalase activity was closely correlated with the distribution characteristics of most elements at different locations in grapevine fields. Also a significant positive correlation was noted between catalase activity and fine sand content. A highly significant positive correlation was noted between catalase activity and clay. The physical properties, especially clay and fine sand content, were other critical factors that influenced the spatial variability of soil catalase activity. Ggrape varieties and soil pH were not correlated with spatial variability of soil catalase activity.