地面覆盖对核桃树干液流变化动态的影响  

Effects of Mulching on Walnut Trunk Sap Flow Variation Trends

作　　者：孙萌[1] 赵爽[1] 李寒 李保国[2] 齐国辉[2] 张雪梅[2] 

机构地区：[1]河北省林木种质资源与森林保护重点实验室(河北农业大学),保定071000 [2]河北省核桃工程技术研究中心(河北农业大学)

出　　处：《东北林业大学学报》2017年第9期18-23,共6页Journal of Northeast Forestry University

基　　金：国家林业公益性行业科研专项(201504408);河北省科技支撑计划项目(16236810D)

摘　　要：为探明地面覆盖对核桃树干液流变化动态的影响,以盛果期核桃为试验材料,对各试验树进行连续观测。结果表明:从核桃茎流通量的典型日变化特征来看,晴天各处理的树干液流日变化呈单峰曲线,阴天呈多峰曲线,各处理变化趋势一致。在干旱季节(6月份),覆盖有机肥、覆盖碎木屑及对照的日最大茎流通量分别为8 183.86、5 765.06、7 269.31 g·h^(-1),处理间差异显著;在雨季(8月份),各处理日最大茎流通量分别为6 468.12、5 670.28、7 093.32 g·h^(-1),处理间差异不显著。晴天各处理的日累积茎流通量分别为72 373.52、54 797.61、62 674.55 g,处理间差异显著;阴天各处理的日累积茎流通量分别为54 945.03、47 248.34、48 476.46 g,处理间差异不显著。各处理的茎流通量与土壤温度的相关系数均达0.9以上,而覆盖处理的茎流通量与土壤温度的相关系数均在0.95以上;各处理的茎流通量与土壤含水量的相关系数均达0.85以上。To prove the effects of mulching on walnut trunk sap flow characteristics, precocious walnut trees of ＇ Lvling＇ in full fruit were used as trial materials, each test tree was observed continuously. From the perspective of the typical diurnal vari- ation characteristics of sap flow, the daily variation was a single peak curve in the sunny day and multiple peak curve in the cloudy day. In the dry season （ in June）, daily maximum sap flows of mulching manure, wood chips and control were 8 183.86, 5 765.06 and 7 269.31 g/h, while in the rainy season （ in August）, they were 6 468.12, 5 670.28 and 7 093.32 g/h, respectively. The diurnal accumulation sap flows of mulching manure, wood chips and control in the sunny weather were 72 573.52, 54 797.61 and 62 674.55 g, while they were 54 945.03, 47 248.54 and 48 476.46 g in the cloudy day, re- spectively. The correlation coefficients of all treatments between sap flow and soil temperature were above 0.9, while the correlation coefficients of the mulching treatments were above 0.95, and the correlation coefficients of all treatments be- tween sap flow and soil humidity were above 0.85.

关 键 词：地面覆盖 核桃树 茎流通量 

分 类 号：S664.1[农业科学—果树学]