Nitrogen Release from Slow-Release Fertilizers in Soils with Different Microbial Activities

Pierfrancesco NARDI; Ulderico NERI; Giovanni DIMATTEO; Alessandra TRINCHERA; Rosario NAPOLI; Roberta FARINA; Guntur V.SUBBARAO; Anna BENEDETTI

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Nitrogen Release from Slow-Release Fertilizers in Soils with Different Microbial Activities

机译：缓释肥料在不同微生物活性土壤中的氮释放

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Soil microbial activity is recognized as an important factor affecting nitrogen (N) release from slow-release fertilizers.However,studies on the effect of size and activity of soil microtlora on fertilizer degradation have provided contrasting results.To date,no clear relationships exist between soil microbial activity and the release of N from slow-release fertilizers.Hence,the aim of this study was to better understand such relationships by determining the release of N from three slow-release fertilizers in soils with different microbial activities.Soils were amended with urea-formaldehyde (UF),isobutylidene diurea (IBDU),and crotonylidene diurea (CDU).Urea,a soluble fertilizer,was used as the control.Fertilized soil samples were placed in a leaching system,and the release of N was determined by measuring ammonium-N and nitrate-N concentrations in leachates during 90 d of incubation.Non-linear regression was used to fit N leaching rate to a first-order model.In all the treated soils,N was released in the order:urea (89％ 100％) ＞ IBDU (59％-94％) ＞ UF (46％-73％) ＞ CDU (44％ 56％).At the end of incubation,N released from CDU did not differ (P ＞ 0.05) among soils.On the contrary,UF and IBDU released significantly lower (P ＜ 0.05) amounts of N in the soil with higher microbial activity and lower pH.The rate constant (K0) for UF was lower (P ＜ 0.05) in the soil with lower pH.Taken togethcr,our results indicated that soil microbial size and microbial activity had a marginal effect on fertilizer mineralization.

机译：土壤微生物活性被认为是影响缓释肥料氮（N）释放的重要因素。然而，关于土壤微生物的大小和活性对肥料降解的影响的研究却提供了相反的结果。迄今为止，两者之间还没有明确的关系。土壤微生物活性和缓释肥料中的氮释放。因此，本研究的目的是通过测定三种微生物活性不同的土壤中的缓释肥料中的氮释放，从而更好地了解这种关系。尿素甲醛（UF），异丁烯二脲（IBDU）和巴豆基二脲（CDU）。以尿素（一种可溶性肥料）为对照。将施肥的土壤样品置于浸出系统中，并通过在培养90 d的过程中测量渗滤液中铵态氮和硝态氮的浓度。使用非线性回归将氮的浸出率拟合为一阶模型。在所有处理过的土壤中， N的释放顺序为：尿素（89％100％）＞ IBDU（59％-94％）＞ UF（46％-73％）＞ CDU（44％56％）。土壤之间的CDU没有差异（P＞ 0.05）。相反，UF和IBDU在微生物活性较高和pH较低的土壤中释放的N量明显较低（P ＜0.05）。UF的速率常数（K0）为在较低pH值的土壤中较低（P ＜0.05）。我们的结果表明，土壤微生物的大小和微生物活性对肥料矿化的影响很小。

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《土壤圈（英文版）》 |2018年第2期|332-340|共9页
作者
Pierfrancesco NARDI; Ulderico NERI; Giovanni DIMATTEO; Alessandra TRINCHERA; Rosario NAPOLI; Roberta FARINA; Guntur V.SUBBARAO; Anna BENEDETTI;
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作者单位

CREA-Council for Agricultural Research and Economics, Research Center for Agriculture and Environment, Via della Navicella 2,Rome 00184(Italy);

CREA-Council for Agricultural Research and Economics, Research Center for Agriculture and Environment, Via della Navicella 2,Rome 00184(Italy);

CREA-Council for Agricultural Research and Economics, Research Center for Agriculture and Environment, Via della Navicella 2,Rome 00184(Italy);

CREA-Council for Agricultural Research and Economics, Research Center for Agriculture and Environment, Via della Navicella 2,Rome 00184(Italy);

CREA-Council for Agricultural Research and Economics, Research Center for Agriculture and Environment, Via della Navicella 2,Rome 00184(Italy);

CREA-Council for Agricultural Research and Economics, Research Center for Agriculture and Environment, Via della Navicella 2,Rome 00184(Italy);

Japan International Research Center for Agricultural Sciences(JIRCAS), Tsukuba 305-8686(Japan);

CREA-Council for Agricultural Research and Economics, Research Center for Agriculture and Environment, Via della Navicella 2,Rome 00184(Italy);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Nitrogen Release from Slow-Release Fertilizers in Soils with Different Microbial Activities

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