《日本道州-平日学杂志》93 - 5摘要

IF 1.9 4区 农林科学 Q3 ENVIRONMENTAL SCIENCES
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引用次数: 0

摘要

2007 - 2012年,玉米青贮采用3种不同的施肥处理,1个试验田施用化肥(C), 2个试验田分别施用有机肥(M)和牛粪(S)。在农田耕层下方埋设一个整体式毛细管渗滤仪,填入深度为20 ~ 70 cm、直径为25 cm的未扰动地下土芯,测量渗滤液体积和无机氮浓度。利用改进的LEACHM模拟结果表明,尽管施氮源不同,但3个处理的无机氮浓度模式(如峰值浓度的大小和时间)与实测结果吻合较好。然而,该模型在每年和/或整个试验期间的无机氮累积淋滤量方面的表现因年份和地块而异。综上所述,该模型对于预测该地区不同氮源玉米青贮田的氮淋失和研究不同情景具有重要价值。未来研究分别测定腐殖质和作物残茬的氮矿化速率,以及堆肥粪肥和堆肥浆的氮转化,对进一步完善模型的预测具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Abstracts of Nippon Dojo-Hiryogaku Zasshi 93 - 5
Corn silage was grown yearly from 2007 to 2012 with three different fertilization treatments: one experimental plot was treated with chemical fertilizer (C) and the other two plots with organic fertilizers of composted cow manure (M) and slurry (S), respectively. A monolith-type capillary lysimeter packed with an undisturbed subsurface soil core of 20–70-cm depth and a diameter of 25 cm was buried below the plow layer in the field to measure leachate volume and inorganic N concentration. The simulated results using modified LEACHM showed a reasonably good agreement with the measured inorganic N concentration patterns, such as the magnitude and timing of peak N concentrations, in the three treatments despite the dif-ferences in the applied N sources. However, the performance of the model with respect to cumulative amounts of inorganic N leached yearly and/or during the whole experimental period varied between years and plots. Overall, the model was a valuable tool for predicting N leaching and examining various scenarios in corn silage fields treated with different N sources in this region. Future studies on separately determining the N mineralization rates of humus and crop residue, as well as the N transformation of composted manure and slurry, would be valuable in further improving the model’s prediction.
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来源期刊
Soil Science and Plant Nutrition
Soil Science and Plant Nutrition 农林科学-农艺学
CiteScore
4.80
自引率
15.00%
发文量
56
审稿时长
18-36 weeks
期刊介绍: Soil Science and Plant Nutrition is the official English journal of the Japanese Society of Soil Science and Plant Nutrition (JSSSPN), and publishes original research and reviews in soil physics, chemistry and mineralogy; soil biology; plant nutrition; soil genesis, classification and survey; soil fertility; fertilizers and soil amendments; environment; socio cultural soil science. The Journal publishes full length papers, short papers, and reviews.
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