AN EVALUATION OF UREA-RUBBER MATRICES AS SLOW-RELEASE FERTILIZERS

被引：22

作者：

HASSAN, ZA

YOUNG, SD

HEPBURN, C

ARIZAL, R

机构：

[1] School of Agriculture, Nottingham University, Sutton Bonington, Loughborough, Leicestershire

[2] Loughborough University of Technology, Loughborough, Leicestershire

来源：

FERTILIZER RESEARCH | 1990年 / 22卷 / 02期

关键词：

Fertilizer; residual; rubber matrix; slow-release; urea;

D O I：

10.1007/BF01116180

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The viability of a 'urea-rubber matrix' (URM) as a slow-release nitrogen fertilizer was assessed by field trials and incubation studies. Encapsulation of urea in the rubber matrix apparently prevented the inhibition of seed germination experienced at high temperatures (> 20°C) following high urea applications. The release of urea from URM increased with temperature and was well described by a diffusion model which allowed for the temperature-dependence of both the diffusion coefficient in water and the saturated concentration of urea. Initial results suggest that the effect of varying the size of URM cuboids on both their release characteristics in moist soil and N-supply to plants is also reasonably well predicted by the diffusion model. In a ryegrass field trial over 24 weeks, the URM gave higher dry matter yields than either prilled urea or (NH4)2SO4 (following a single application at sowing) through efficient matching of nitrogen supply and crop demand. © 1990 Kluwer Academic Publishers.

引用

页码：63 / 70

页数：8

共 13 条

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