在热带酸性土壤中施用堆肥后的土壤pH缓冲能力和氮有效性

IF 2 4区 农林科学 Q3 ECOLOGY
O. Latifah, O. Ahmed, N. M. Majid
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引用次数: 31

摘要

热带酸性土壤常年处于高降雨量、高温度的热带环境中,是一种高度风化的土壤,影响着土壤氮素的有效性。土壤有机氮是估算土壤氮有效性的重要手段。本研究采用尿素与堆肥配合施用,以减少对尿素的单一依赖,缓冲土壤酸化,减少土壤中氮的淋失。因此,进行了土壤缓冲能力、培养和有机氮分异研究,以确定堆肥后培养90天后土壤的缓冲能力、全氮、有机组分氮和无机氮的有效性。堆肥处理和尿素与堆肥配施处理的土壤pH、缓冲能力、全氮、有机氮组分、交换态铵和速效硝态氮均较高。尿素和堆肥的土壤总水解氮、铵态氮、(铵+氨基糖)氮、氨基糖氮和氨基酸氮含量较高,说明尿素和堆肥的添加影响了土壤有机组分氮分解为无机氮(铵态氮和速效硝态氮)的速率。尿素可以与堆肥一起添加,以调节土壤中的有效氮,供作物利用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Soil pH Buffering Capacity and Nitrogen Availability Following Compost Application in a Tropical Acid Soil
ABSTRACT Tropical acid soils are highly weathered as they exist under tropical environment with high rainfall and temperature throughout the year, which affects nitrogen availability. Soil organic nitrogen is important in estimating soil nitrogen availability. The combined use of urea and compost in this study was carried out to decrease sole dependence on urea, buffer soil acidification, and reduce nitrogen losses through leaching. Thus, soil buffering capacity, incubation, and organic nitrogen fractionation studies were conducted to determine soil buffering capacity, availability of total nitrogen, organic fractions nitrogen, and inorganic nitrogen in soil after 90 days of incubation following compost. Soil pH, buffering capacity, total nitrogen, organic nitrogen fractions, exchangeable ammonium, and available nitrate were higher in all treatments with compost and combined use of urea and compost. Total hydrolyzable nitrogen, ammonium-nitrogen, (ammonium + amino sugar)-nitrogen, amino sugar-nitrogen, and amino acid-nitrogen were higher in soils with urea and compost suggesting that decomposition of soil organic fractions nitrogen into inorganic nitrogen (ammonium and available nitrate was affected by the addition of urea and compost. Urea can be amended with compost to regulate availability nitrogen in soil for crop use.
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来源期刊
Compost Science & Utilization
Compost Science & Utilization 农林科学-生态学
CiteScore
4.10
自引率
0.00%
发文量
0
审稿时长
>36 weeks
期刊介绍: 4 issues per year Compost Science & Utilization is currently abstracted/indexed in: CABI Agriculture & Environment Abstracts, CSA Biotechnology and Environmental Engineering Abstracts, EBSCOhost Abstracts, Elsevier Compendex and GEOBASE Abstracts, PubMed, ProQuest Science Abstracts, and Thomson Reuters Biological Abstracts and Science Citation Index
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