玉米根系空间分布特性的数学模拟及应用  

Mathematical Simulation of Maize Root Spatial Distribution and Its Application

作　　者：张玉[1,2] 秦华东[1,3] 伍龙梅[1] 李忠[1] 张婧[1] 江立庚[1] 

机构地区：[1]广西大学作物栽培学与耕作学实验室,南宁530005 [2]广西农业科学院玉米研究所,南宁530227 [3]广西大学图书馆,南宁530005

出　　处：《玉米科学》2015年第4期92-97,103,共7页Journal of Maize Sciences

基　　金：广西农业科学院科技发展基金项目(2015JZ05);水稻和玉米高效规模种植新技术集成研究与应用示范(桂科攻10100004-6)

摘　　要：通过根箱试验获取玉米根系坐标数据,采用方程y=1/1/k+ae^-bx建立根系纵向和横向分布模型,利用模型分析田间氮肥运筹以及不同品种对玉米根系生长及分布的影响,研究玉米根系在土壤中的空间分布特性。结果表明,玉米在拔节期和灌浆盛期,分别约49.7%和20.7%的根系分布在20 cm深度土层内,34.6%和46.6%根系分布在20 cm横向范围内,其纵向和横向累积长度的变化均可用Logistic方程模拟。重基肥处理能够扩大拔节期的根系的空间分布。The root box experiments were conducted to collect root distribution data. y=1/1/k＋ae-bx where y was the total root length, and x was the distance of root horizontal distribution or the depth of root vertical distrihution, was used to establish root distribution model. Moreover, the root spatial distribution characteristics of maize were studied, and the influences of N management on root growth and distribution were analyzed using the model. The results showed that about 49.7% and 20.7% of roots were distributed in the top 20 cm soil layer, and 34.6% and 46.6% of the roots were distributed in horizontal range of 20 cm from the plant al elongation stage and grain filling stages. The change in total root length with the distance of root horizontal distribution or the depth of root vertical distribution could be simulated by the equation of Logistic. Heavy base fertilizer can promote root growth of elongation stage.

关 键 词：玉米 根构型 氮肥处理 株型 

分 类 号：S513.01[农业科学—作物学]