MODELING SOIL-NITROGEN LEVELS UNDER ACACIA SORGHUM ROTATIONS

被引：7

作者：

ROBERTSON, WH

机构：

[1] Institute of Terrestrial Ecology, Edinburgh Research Station, Penicuik, EH26 0QB, Midlothian, Bush Estate

来源：

AGROFORESTRY SYSTEMS | 1994年 / 27卷 / 03期

关键词：

NITROGEN-CYCLE MODEL; CROP ROTATION; ACACIA SENEGAL; SORGHUM BICOLOR;

D O I：

10.1007/BF00705062

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A mathematical model is formulated and implemented for the nitrogen (N) cycle, on a yearly time scale, in an arid-zone fallow system. The model is generally applicable to such systems; by combining data from a number of sources, its behaviour is investigated for a generic sorghum bicolor - Acacia senegal system. The model reproduces such observed effects as the initial fall in soil N early in the Acacia rotation, and provides support for the hypothesis that the N fixing potential of Acacia roots is less important than their ability to take up otherwise inaccessible mineral N through deep roots.

引用

页码：283 / 292

页数：10

共 7 条

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[2]

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[3]

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[4]

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[5]

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[6]

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[7]

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