Effects of Cattle Biogas Effluent Application and Irrigation Regimes on Rice Growth and Yield: A Mesocosm Experiment

IF 0.3 4区农林科学 Q4 AGRICULTURE, MULTIDISCIPLINARY

Jarq-japan Agricultural Research Quarterly Pub Date : 2022-10-01 DOI:10.6090/jarq.56.341

Khanh Cong Huynh, Kazunori Minamikawa, N. Nguyen, Chiem Huu Nguyen, Công Văn Nguyến

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引用次数: 0

Abstract

Biogas effluent (BE) is a potential source of fertilizer for rice. Alternate wetting and drying (AWD) irrigation based on surface water level can increase rice grain yield (GY), but its effect under BE application is still unclear. To test whether AWD can increase GY under BE application, we conducted a mesocosm experiment under screen-house conditions in Can Tho, Vietnam. We measured rice growth and yield under three nitrogen (N) treatments—zero-N (Z), synthetic fertilizer (SF), and BE—and two irrigation regimes—continuous flooding (CF) and AWD with a re-irrigation threshold of 15 cm below the soil surface. Chlorophyll content (SPAD) and leaf color chart (LCC) values were higher in SF than in BE, but plant height was comparable. Although GY was not significantly different between CF and AWD, AWD increased it by 12% in BE relative to CF. All N use efficiency (NUE) indices (apparent N recovery, agronomic NUE, and internal NUE) were comparable between AWD and CF in BE and SF. The results indicate that AWD irrigation is feasible under the application of cattle BE and the combination can improve rice GY.

查看原文本刊更多论文

沼液施用和灌溉方式对水稻生长和产量的影响:一个中生态试验

沼气废水是一种潜在的水稻肥料来源。基于地表水位的干湿交替灌溉(AWD)可以提高水稻产量，但在BE的应用下其效果尚不清楚。为了检验AWD是否能在BE的作用下增加GY，我们在越南芹苴进行了纱棚条件下的中观试验。我们测量了三种氮肥处理(零氮、合成肥和be)和两种灌溉方案(连续淹水和AWD，再灌溉阈值为土壤表面以下15厘米)下水稻的生长和产量。SF的叶绿素含量(SPAD)和叶色图值(LCC)高于BE，但株高与BE相当。土壤肥力与土壤肥力之间差异不显著，但土壤肥力使BE的氮素利用效率(NUE)指数(表观氮素恢复、农艺氮素利用效率和内部氮素利用效率)在BE和SF中与土壤肥力之间具有可比性。结果表明，在牛BE的施用下，AWD灌溉是可行的，且两者组合可提高水稻的GY。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Jarq-japan Agricultural Research Quarterly 农林科学-农业综合

CiteScore

1.00

自引率

25.00%

发文量

审稿时长

>36 weeks

期刊介绍： The Japan Agricultural Research Quarterly (JARQ) is a publication of the Japan International Research Center for Agricultural Sciences (JIRCAS), which provides readers overseas with the latest information on key achievements and developments in agricultural research in Japan, with the expectation that this information would contribute to the agricultural development of countries in tropical and subtropical regions.