不同装土量对玉米根系中全量养分含量及吸收量的影响  

Effects of Different Soil Amounts on Total Nutrients Content and Nutrients Uptake Amounts of Maize Root

作　　者：李月芬[1] 杨有德[1] 赵兰坡[2] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]吉林农业大学资源与环境学院,长春130118

出　　处：《吉林农业大学学报》2008年第3期306-309,315,共5页Journal of Jilin Agricultural University

基　　金：国家自然科学基金项目(30370846);吉林省科技发展重点项目(20040204-1-1);国家粮食丰产工程项目(2004BA520A09)

摘　　要：以松辽平原玉米带黑土区现行耕作制度下产生的2种不同剖面构型——"波浪型"和"平面型"导致的有效土量差异为背景,采用室外盆栽模拟试验,研究了不同装土量对苗期、抽雄期和成熟期玉米根系全氮、全磷、全钾含量以及吸收量的影响。结果表明:全氮、全磷和全钾呈现基本一致的变化规律,即随装土量增加,苗期和成熟期玉米根系全量养分吸收量增加,并且全量养分含量的变化规律为苗期最高,随着时间的推移含量逐渐递减,苗期到抽雄期下降速率最快,而抽雄期以后降幅不大。This paper was based on the background of different effective soil amounts resulting from two different sectional types＂wave type＂ and ＂flat type＂ under the current cultivation system in the black soil of Songliao plain maize belt. The tested soil was the medium-fertility black soil in the experiment station of Jilin Agricultural University.We studied the effects of different soil amounts on total nitrogen content,total phosphorus content,total potassium content and nutrients uptake amount of maize root during the weeding stage,the heading stage and the maturity stage by the outdoor simulation potted experiment.The results showed that total nutrients of maize root increased with the increase of packing soil amounts,while total nutrients of maize root reached the highest value during the seeding stage,and they decreased gradually subsequently,and the rate of decreasing reached the maximum during the stage from seeding to heading,but after heading stage,the rate of decreasing was not significant.

关 键 词：耕作层厚度 装土量 全量养分含量 养分吸收量 玉米根系 

分 类 号：S158.3[农业科学—土壤学]