不同土壤层次供应水分和养分对玉米幼苗生长和吸收养分的影响  

Effect of Water and Nutrients Supplying in Different Soil Layers on Growth and Nutrition Absorption of Corn Seedlings

作　　者：田霄鸿[1] 聂刚[1] 李生秀[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《土壤通报》2002年第4期263-267,共5页Chinese Journal of Soil Science

基　　金：国家自然科学基金 (49890 330 ;39970 4 2 9) ;国家重点基础研究项目 (G1 9990 1 1 70 7);国家自然科学基金农业倾斜项目 (30 0 70 4 2 9)资助

摘　　要：本试验模拟滴灌方法 ,在不同土壤层次进行灌水和施用氮磷养分的盆栽玉米试验 ,旨在探讨在不同土壤层次供应水分和养分对夏玉米幼苗生长、根系空间构型及玉米对养分吸收的影响。试验表明 :在土壤深层进行滴灌可以有效降低土面蒸发 ,提高水分和养分的利用效率 ,从而显著提高玉米幼苗的生长量 ;在不同层次施肥灌水 ,对玉米根系在土壤中的空间构型影响很大 ,进行深层滴灌可以极大促进根系在较深土壤中的发育 ;在不同土层施肥灌水对玉米幼苗吸收N、P、K三种养分的能力也有影响 ,深层施肥灌水提高了玉米对Drip irrigation method was simulated in this experiment in different soil layers Pot experiments with irrigation and nitrogen and phosphorus application were conducted for investigating the influence of water and nutrients supplying in different soil layers on the seedling growth,spatial root model as well as nutrient absorption.The results showed that in the deeper layer dripping irrigation can effectively reduce soil surface evaporation and increase the utilization efficiency of water and nutrient, therefore can significantly increase the growth of maize.Watering and fertilizing in different soil layers can greatly affect corn root spatial distribution in the soil and dripping in the deeper soil layer can greatly stimulate root development in deeper soil layer.Watering and fertilization in different soil layers can also influence absorption ability of N,P,K.Dripping and fertilization in deeper layer increased the uptake amount of N,P,K.

关 键 词：土壤层次 玉米 幼苗生长 模拟滴灌 根系构型 养分吸收 水分供应 

分 类 号：S152.75[农业科学—土壤学] S513[农业科学—农业基础科学]