NITROGEN LEACHING AND PLANT UPTAKE FROM CONTROLLED-RELEASE FERTILIZERS

被引：58

作者：

MIKKELSEN, RL

WILLIAMS, HM

BEHEL, AD

机构：

[1] Department of Soil Science, North Carolina State University, Raleigh, 27695, NC

[2] National Fertilizer and Environmental Research Center, Tennessee Valley Authority, Muscle Shoals, 35660, AL

来源：

FERTILIZER RESEARCH | 1994年 / 37卷 / 01期

关键词：

EUONYMUS-PATENS REHD; ISOBUTYLIDENE DIUREA; OSMOCOTE; OXAMIDE; PROKOTE PLUS; SULFURCOATED UREA; UREA FORMALDEHYDE;

D O I：

10.1007/BF00750672

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Controlled-release N fertilizers are commonly used in the production of container-grown ornamental crops, yet the relative effects of various nutrient sources on N leaching are not well known. A 27-week experiment was conducted to evaluate N leaching loss and plant growth following two applications of six controlled-release N fertilizers and one soluble N fertilizer to container-grown Euonymus patens Rehd. The controlled-release fertilizers evaluated were (noncoated) isobutylidene diurea, oxamide, urea formaldehyde, and (coated) Osmocote, Prokote Plus, and sulfur-coated urea. Of the fertilizers tested, the coated fertilizers generally out-performed the noncoated fertilizers in reducing N leaching losses, stimulating plant growth, and increasing tissue N concentrations. Low N concentrations in the leachate of some treatments indicated efficient nutrient use by the plant. In other treatments, low N concentrations in the leachate merely reflected incomplete N release from the fertilizer. A daily application of NH4NO3 resulted in a constant rate of N loss but was not the most effective in promoting growth. Plant growth, tissue N concentrations, and N leaching losses were all increased by doubling the fertilizer application rate from 1 kg N m-3 to 2 kg N m-3.

引用

页码：43 / 50

页数：8

共 12 条

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