Irrigation development as a booster of the multifunctional roles of paddy rice

IF 1.6 4区农林科学 Q2 AGRONOMY

Irrigation and Drainage Pub Date : 2023-08-29 DOI:10.1002/ird.2882

Margarita Garcia-Vila, Hanae Suzuki, Waqas Ahmad, Akhter Ali, Eva Pek, Maher Salman

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引用次数: 0

Abstract

To promote sustainable production and the multiple roles of paddy rice, it is essential to expand our understanding of the impacts of different management options, with particular emphasis on irrigation development. The impact of various management practices (supplementary irrigation during the rainy season, improved fertilization, cropping during the dry season and mulching practices) on irrigation water requirements, crop productivity and the multifunctional roles of irrigated paddy rice was evaluated in diverse agro-ecological zones of Zambia, by using the AquaCrop model. Irrigation development has been demonstrated to boost paddy rice production (by 8%) in the southern districts by providing supplementary irrigation (about 150 mm) during the rainy season. Additionally, supplementary irrigation during the rainy season can make improved fertilization more attractive, doubling the yield rise under rainfed conditions. The required irrigation development would also enable paddy rice cropping intensification by allowing for dry season sowing (with net irrigation requirements from 700 to 800 mm). Moreover, the associated straw production increase could also play an important role as mulch during the dry season, reducing the net irrigation requirements by 15%. These findings will enable policymakers to make informed decisions regarding investment strategies and policies.

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灌溉作为水稻发展的助推器具有多种功能

为了促进可持续生产和水稻的多重作用，必须扩大我们对不同管理选择的影响的理解，特别强调灌溉发展。利用AquaCrop模型，在赞比亚不同的农业生态区评估了各种管理措施(雨季补充灌溉、改良施肥、旱季种植和覆盖措施)对灌溉用水需求、作物生产力和灌溉水稻的多功能作用的影响。灌溉发展已被证明可以通过在雨季提供补充灌溉(约150毫米)来提高南部地区的水稻产量(提高8%)。此外，在雨季补充灌溉可以使改良施肥更具吸引力，使雨养条件下的产量增加一倍。所需的灌溉发展也将使水稻种植集约化，允许旱季播种(净灌溉需求为700至800毫米)。此外，秸秆产量的增加在旱季也可以起到重要的覆盖作用，使净灌溉需要量减少15%。这些发现将使决策者能够就投资战略和政策做出明智的决策。

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

Irrigation and Drainage 农林科学-农艺学

CiteScore

3.40

自引率

10.50%

发文量

107

审稿时长

3 months

期刊介绍： Human intervention in the control of water for sustainable agricultural development involves the application of technology and management approaches to: (i) provide the appropriate quantities of water when it is needed by the crops, (ii) prevent salinisation and water-logging of the root zone, (iii) protect land from flooding, and (iv) maximise the beneficial use of water by appropriate allocation, conservation and reuse. All this has to be achieved within a framework of economic, social and environmental constraints. The Journal, therefore, covers a wide range of subjects, advancement in which, through high quality papers in the Journal, will make a significant contribution to the enormous task of satisfying the needs of the world’s ever-increasing population. The Journal also publishes book reviews.