新疆沙壤土枸杞园不同土层营养元素的相关性

摘要

为给新疆枸杞主产区制定合理的配肥方案以及实现高产优质提供理论参考,以新疆精河县沙壤土初果期枸杞园年不同生长时期0~20 cm、20~60 cm深度土壤为研究对象,通过采集园内年不同生长时期不同深度土样并测定其相关土壤营养元素含量,分析各营养元素年际动态分布规律并对不同深度土壤营养元素含量的相关性进行研究.结果显示:各土层土壤大量营养元素N、K含量大于P含量,且此3种元素多以夏果膨大期和夏果采后花芽分化期含量相对较高;不同深度土壤有机质及矿质元素含量多存在显著差异,有机质、N、K总体表现为表层(0~20 cm)含量大于底层(20~60 cm),P、Zn、Fe、Mn则表现为表层含量小于底层;年不同生长时期、不同深度土层相同常规营养元素N、K和微量元素Fe、B含量间存在显著的正相关性,不同元素N、P与K,N、P、K与Zn、Fe、B和有机质含量之间也存在显著的正相关性,而其他相同或不同元素含量间无显著相关性.%In order to provide some theoretical references for making reasonable organic fertilization measurements and achieving high yield and good quality at main wolfberry producing areas of Xinjiang, at different growth periods of one year, 0-20 cm and 20-60 cm depths of soil of wolfberry orchard in Jinghe County of Xinjiang were taken as research object, which was at primary fruit period and had sandy loam, different depths of soil samples were collected at different growth periods in Chinese wolfberry orchard and the relevant soil nutrient contents were determined, annual distribution dynamics of various nutrient elements were analyzed, and correlation between nutrient elements contents in different soil depths were studied.The results show that N and K contents in different soil lays were significantly higher than P element contents,and contents of N,K and P were relatively higher at summer fruit expanding period and at flower bud differentiation period after summer fruit harvested; there were significant differences among contents of soil organic matter and mineral elements in different depths, overall contents of organic matter and N, K elements in surface layer (0-20 cm) were higher than those in bottom layer (20-60 cm), and contents of P, Zn, Fe and Mn was the opposite; there was a significant positive correlation of contents of the same conventional nutritional elements N,K and trace elements Fe,B between different growth periods and different soil depths,there was a significant positive correlation between different elements,such as between N,P and K or between N,P,K and Zn,Fe,B,organic matter,but there was no significant correlation between contents of other same or different elements.