摘要
本试验主要研究不同土壤水势条件下桃树茎干的变化规律。试验设置4个处理,分别是-100^-110 kPa(A区),自然条件下作为对照(B区),-10^-20 kPa(C区),-40^-60 kPa(D区)。分析不同月份各个处理桃树茎干日变化之间的差异,结果表明,桃树茎干日生长量在休眠期基本为负值,第一生长期内平均日生长量在20~50μm之间,第二生长期内平均日生长量在30~70μm之间,停长期内平均日生长量出现正负交替。结果同时表明,各处理桃树在整个生长周期内茎干生长量存在显著差异,整个生长周期内生长量由大到小顺序为D>C>A>B。综合分析得出,在桃树整个生长周期内将土壤水势维持在-40^-60 kPa时有利于桃树生长。
This test is mainly to study the variation discipline of stem of peach tree in the condition of different soil water potentials.The test is designed in four treatments,which are-100～-110 kPa（A）,control under natural condition（B）,-10～-20 kPa（C） and-40～-60 kPa（D）.Then analysis is made of the difference of the daily change of the stem of peach tree in each area in different seasons.The results indicate that the daily growth of the stem in dormant time is almost negative value.In the first period,the average of daily growth is between 20～50 μm.In the second period,the average of daily growth is between 30～70 μm.In the period of growth stopping,the average of daily growth is in alteration of positive and negative.At the same time,in each area the growth of the stem of peach tree in growing periodicity is significantly different and the subsequence is DCAB.From the comprehensive analysis,in growth periodicity of peach tree,the soil water potential kept at-40～-60 kPa will be propitious to the growth of peach tree.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第5期176-180,共5页
Agricultural Research in the Arid Areas
基金
国家"十一五"863项目现代节水农业技术创新平台(2006AA100223)
"干旱半干旱地区水文生态与水安全学科创新引智基地"项目(B08039)
关键词
桃树
土壤水势
茎干变化
peach tree
soil water potential
stem diameter variation
