LEACHING OF SPRING APPLIED FERTILIZER NITROGEN - MEASUREMENT AND SIMULATION

被引：9

作者：

LORD, EI

BLAND, G

机构：

[1] Agricultural Development and Advisory Service, Wolverhampton, WV6 8TQ, Wood-thorne

来源：

SOIL USE AND MANAGEMENT | 1991年 / 7卷 / 02期

关键词：

D O I：

10.1111/j.1475-2743.1991.tb00858.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The leaching of spring-applied fertilizer nitrogen was measured by soil sampling on three soils widely used for spring cropping: a loamy sand, a sandy loam and a sandy silt loam. Soils were fallow during the experiment. Results were compared with simulations obtained with a computer leaching model. The model differentiated well between soil types, and predicted mineral nitrogen remaining in the top 30, 60 or 90 cm with reasonable precision. It tended to over-estimate the rate of nitrification of ammonium from ammonium nitrate fertilizers. The causes of occasional large discrepancies between sampling and measurement are discussed.

引用

页码：110 / 114

页数：5

共 8 条

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