土壤紧实度对楸子幼苗根系生长及活力的影响  

The Effect of Soil Compaction on Root Growth and Root Activity of Malus prunifolia Seedlings

作　　者：吴亚维[1,2] 马锋旺[1] 邹养军[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100 [2]贵州省果树科学研究所,贵州罗甸550100

出　　处：《贵州农业科学》2009年第3期118-120,共3页Guizhou Agricultural Sciences

基　　金：农业部"948"引进项目"优质出口苹果生产加工技术引进与示范"(2006-G28);西北农林科技大学拔尖人才支持计划项目(200522)

摘　　要：为了研究土壤紧实度对果树幼苗期根系生长发育的影响,试验以楸子幼苗为材料,采用盆栽试验观测了3种土壤紧实度(1.25 g/cm31、.40 g/cm3和1.55 g/cm3)下楸子幼苗根系形态变化以及根系活力和生物量的变化。结果表明,随着土壤紧实度增加,楸子幼苗移栽成活率降低,根系生长减慢,根系活力和根系生物量下降,尤其在1.55 g/cm3土壤容重下幼苗根系生理功能受到显著影响,根冠比(R/T)没有规律性变化;土壤紧实度影响楸子幼苗根系形态和生理功能代谢,高紧实度土壤不利于楸子幼苗根系生长。The Malus prunifolia seedlings were cultured in pots with three different soil eompactions to study the effect of soil compaction on its root growth and development by determining survival rate of transplanted seedlings, root morphological change, root activity and biomass. The results showed that the survival rate of transplanted seedlings, root activity, root growth speed and biomass decreased with increase of soil compaction and the root physiological function was significantly affected under 1. 55 g/cm^3 of soil eompaetion. The soil compaction has the effect of root morphology and physiological function of Malus prunifolia seedlings and the high soil compaction is not beneficial to root growth of Malus prunifolia seedlings.

关 键 词：土壤紧实度 楸子 根系 生活 活力 

分 类 号：S152.49[农业科学—土壤学]