Modelling of moisture movement and irrigation scheduling in drip irrigated tomato using CROPWAT and HYDRUS-1D

Q3 Agricultural and Biological Sciences

Journal of Agrometeorology Pub Date : 2024-06-01 DOI:10.54386/jam.v26i2.2492

Nuzhat Bint Nazir, Yogesh Pandey, S. Qayoom, S. M. Dadhich

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引用次数: 0

Abstract

The irrigation systems require modernization and management by evaluating water system prerequisites precisely. A study was carried out at Srinagar during kharif 2022 to determine the crop water demands, irrigation scheduling and simulation of moisture movement under different irrigation regimes on tomato crop in open field conditions using CROPWAT and HYDRUS-1D models. The results revealed that the average crop water requirement at 100% ETC per plant per day was 0.24 l plant-1 day-1 during the initial stage, 0.37 l plant-1 day-1 during development stage, 0.85 l plant-1 day-1 during mid-stage and 0.74 l plant-1 day-1 during the end stage. Soil water content was simulated by HYDRUS-1D model in 0 to 30 cm of soil profile. Higher values (0.86 to 0.95) of coefficient of determination (R2) indicated that observed and simulated values of moisture content are highly correlated and the model predicts that lower values of mean absolute error (MAE) and root mean square error (RMSE) indicates that the HYDRUS-1D model is more accurate at simulating the movement of moisture under different irrigation regimes.

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利用 CROPWAT 和 HYDRUS-1D 建立滴灌番茄的水分流动和灌溉调度模型

灌溉系统需要现代化管理，精确评估水系统的先决条件。在斯利那加开展了一项研究，利用 CROPWAT 和 HYDRUS-1D 模型，确定了 2022 年种植季露地番茄作物的需水量、灌溉时间安排以及不同灌溉制度下的水分流动模拟。结果显示，在 100%ETC条件下，作物初期平均需水量为 0.24 升/株-天-1，生长期为 0.37 升/株-天-1，中期为 0.85 升/株-天-1，末期为 0.74 升/株-天-1。HYDRUS-1D 模型模拟了 0 至 30 厘米土壤剖面的土壤含水量。较高的判定系数 (R2) 值（0.86 至 0.95）表明含水量的观测值和模拟值高度相关，模型预测的平均绝对误差 (MAE) 值和均方根误差 (RMSE) 值较低，表明 HYDRUS-1D 模型在模拟不同灌溉制度下的水分变化时更为准确。

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来源期刊

Journal of Agrometeorology 农林科学-农艺学

CiteScore

1.40

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Agrometeorology (ISSN 0972-1665) , is a quarterly publication of Association of Agrometeorologists appearing in March, June, September and December. Since its beginning in 1999 till 2016, it was a half yearly publication appearing in June and December. In addition to regular issues, Association also brings out the special issues of the journal covering selected papers presented in seminar symposia organized by the Association.