Distribution of soil water and nitrate in furrow irrigation under different plastic mulch placement conditions for a maize crop: Field and modelling study

IF 2 4区农林科学 Q2 AGRONOMY

International Agrophysics Pub Date : 2021-05-07 DOI:10.31545/INTAGR/135338

Ali Pahlevani, H. Ebrahimian, F. Abbasi, H. Fujimaki

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引用次数: 3

Abstract

*Corresponding author e-mail: ebrahimian@ut.ac.ir A b s t r a c t. The use of plastic mulch in furrow irrigation increases irrigation efficiency and improves crop yield. In this study, the effect of the placement of plastic mulch on the furrows and/or on the ridges on reducing water loss and nitrate leaching for furrow-fertigated maize was investigated. Field experiments were carried out including four different treatments which differed according to the placement of plastic mulch on a clay loam soil: plastic mulch on the ridge, plastic mulch on the furrow bed, plastic mulch on the ridge and the furrow bed and control treatment without the mulch. The HYDRUS-2D model was used to simulate water movement and nitrate transfer within the soil. The HYDRUS-2D model was well calibrated and validated using field data. Three irrigation scenarios were also compared including 125, 100 and 75% of the crop water requirement. In the case of using mulch and full irrigation (i.e. 100% crop water requirement), nitrate losses compared to the control treatment with 25% over-irrigation decreased by 52, 44, and 30%, in the the treatments of mulch on the furrow bed, mulch on the ridge and mulch on the ridge and the furrow bed, respectively. Deep percolation of irrigation water also decreased by 53, 48, and 41%, respectively. The use of plastic mulch on the furrow bed with less irrigation depth could be used to prevent water and nitrate losses in furrow irrigation.

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玉米不同地膜覆盖条件下沟灌土壤水分和硝酸盐的分布：田间和模型研究

*通讯作者e-mail: ebrahimian@ut.ac.ir A b st r A c t。地膜在沟灌中的应用提高了灌溉效率，提高了作物产量。本试验研究了垄沟覆盖和垄沟覆盖对减少沟肥玉米水分流失和硝酸盐淋失的影响。在粘土壤土上进行了四种不同地膜处理:垄上地膜、沟床地膜、垄上地膜和沟床地膜以及不覆盖地膜的对照处理。采用HYDRUS-2D模型模拟土壤中的水分运动和硝酸盐迁移。HYDRUS-2D模型通过现场数据进行了很好的校准和验证。还比较了三种灌溉方案，分别为作物需水量的125、100和75%。在覆盖和充分灌溉(即100%作物需水量)的情况下，与过量灌溉25%的对照处理相比，沟床覆盖、垄上覆盖和垄上覆盖和沟床覆盖的硝酸盐损失分别减少了52%、44%和30%。灌溉水深渗量也分别减少了53%、48%和41%。在灌溉深度较浅的沟床上覆盖地膜可以有效地防止沟灌水分和硝酸盐的流失。

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来源期刊

International Agrophysics 农林科学-农艺学

CiteScore

3.60

自引率

9.10%

发文量

审稿时长

3 months

期刊介绍： The journal is focused on the soil-plant-atmosphere system. The journal publishes original research and review papers on any subject regarding soil, plant and atmosphere and the interface in between. Manuscripts on postharvest processing and quality of crops are also welcomed. Particularly the journal is focused on the following areas: implications of agricultural land use, soil management and climate change on production of biomass and renewable energy, soil structure, cycling of carbon, water, heat and nutrients, biota, greenhouse gases and environment, soil-plant-atmosphere continuum and ways of its regulation to increase efficiency of water, energy and chemicals in agriculture, postharvest management and processing of agricultural and horticultural products in relation to food quality and safety, mathematical modeling of physical processes affecting environment quality, plant production and postharvest processing, advances in sensors and communication devices to measure and collect information about physical conditions in agricultural and natural environments. Papers accepted in the International Agrophysics should reveal substantial novelty and include thoughtful physical, biological and chemical interpretation and accurate description of the methods used. All manuscripts are initially checked on topic suitability and linguistic quality.