板栗叶片及土壤养分含量对产量影响

Effects of leaf nutrient and soil nutrient on yield of Chinese chestnut(Castanea mollissima Bl.)

为了解迁西板栗“燕山早丰”叶片及土壤养分含量对产量的影响,通过路径分析和相关性分析对迁西县17个代表性“燕山早丰”板栗园土壤和叶片养分状况与产量进行分析,得出叶片不同养分元素以及土壤养分含量对板栗产量影响的直接作用和间接作用。结果显示,路径分析中残差值均小于0.4,即板栗叶片或土壤的养分元素含量对产量的影响权重均超过60%;高产果园中,提高板栗叶片N、P、Ca、Mn、Fe、Mg含量,提高土壤N、Fe、Mn含量均有利于提高板栗产量;低产果园中,提高板栗叶片N、Ca、Mg含量,提高土壤N含量均有利于提高板栗产量。因此,在高产果园中,向土壤中增施N、P、Fe、Mn等肥料,向叶面喷施Ca、Mg等叶面肥料均有利于提高板栗产量;低产果园中,向土壤中增施N肥和向叶面喷施Ca、Mg、Fe、Cu等元素叶面肥料是提高产量的有效措施。

This study aimed to analyze the relationship between yield and related leaf and soil nutrients,by using correlation and path analysis of Castanea mollissima cv.‘yanshanzaofeng’at Tangshan,Hebei Province of China over two growing seasons.17 chestnut orchards cultivated Castanea mollissima cv.‘yanshanzaofeng’were selected in this study and the leaf nutrition content,soil available nutrients and yield were measured.A residual of 0.3901,0.2201,0.2381 and 0.1351 indicated the yield components measured in this study recorded more than 60%magnitude.Increasing contents of foliar N,P,Ca,Mn,Fe,Mg and improving soil N,Fe,Mn contents led to higher chestnut yield in high yield orchards.Higher status of foliar N,Ca,Mg contents and soil Ca,Mg contents led to higher yield in low yield orchards.In conclusion,soil application of N,P,Fe,Mn and foliar application of Ca,Mg will increase chestnut yield in high yield orchard.And in low yield orchard,soil application of N and foliar application of Ca,Mg,Fe,Cu will increase chestnut yield.