SIMULATION OF NUTRIENT-UPTAKE BY A GROWING ROOT-SYSTEM CONSIDERING INCREASING ROOT DENSITY AND INTERROOT COMPETITION

被引：20

作者：

HOFFLAND, E ^{[1
]}

BLOEMHOF, HS ^{[1
]}

LEFFELAAR, PA ^{[1
]}

FINDENEGG, GR ^{[1
]}

NELEMANS, JA ^{[1
]}

机构：

[1] WAGENINGEN UNIV AGR,DEPT THEORET PROD ECOL,6708 PD WAGENINGEN,NETHERLANDS

来源：

PLANT AND SOIL | 1990年 / 124卷 / 02期

关键词：

Brassica napus L; CSMP; diffusion; inter-root competition; mass flow; nitrate; nutrient uptake; quartz sand; simulation model; zero-sink;

D O I：

10.1007/BF00009252

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A simulation model is presented which describes uptake of a growth limiting nutrient from soil by a growing root system. The root surface is supposed to behave like a zero-sink. Uptake of the nutrient is therefore determined by the rate of nutrient supply to the root surface by mass flow and diffusion. Inter-root competition and time dependent root density are accounted for by assigning to each root a finite cylindrical soil volume that delivers nutrients. The radius of these cylinders declines with increasing root density. Experiments with rape plants grown on quartz sand were used to evaluate the model. Simulated nitrogen uptake agreed well with observed uptake under nitrogen limiting conditions. In case no nitrogen limitation occurred nitrogen uptake was overestimated by the model, probably because the roots did not behave like a zero-sink any more. © 1990 Kluwer Academic Publishers.

引用

页码：149 / 155

页数：7

共 14 条

[1] UPTAKE OF SOLUTES BY MULTIPLE ROOT SYSTEMS FROM SOIL .3. MODEL FOR CALCULATING SOLUTE UPTAKE BY A RANDOMLY DISPERSED ROOT SYSTEM DEVELOPING IN A FINITE VOLUME OF SOIL [J].