不同矿化度水源膜下滴灌棉田土壤水盐动态和作物生长模拟
Simulation of soil water and salt migration and crop growth under film drip irrigation with different water salinity in cotton filed
孔春贤 1杨广 1刘承岳 1苏军 2贾伟康 2田浩 1赵丽 1冉茂林 1潘月 1王海龙3
作者信息
- 1. 石河子大学水利建筑工程学院,新疆石河子 832003;寒旱区生态水利工程兵团重点实验室,新疆石河子 832003;现代节水灌溉兵团重点实验室,新疆石河子 832003
- 2. 石河子市水利工程管理服务中心,新疆石河子 832000
- 3. 新疆玛纳斯河流域管理局水利管理中心第二水利管理站,新疆石河子 832000
- 折叠
摘要
为构建适用于干旱区膜下滴灌条件的土壤水盐动态分布和棉花生长模型,基于2020-2021年的田间试验,经过对SWAP模型的土壤、土壤水力功能和作物生长等模块进行率定和验证,对灌溉水矿化度为1、2、3、4、5、6 g.L-1时的土壤水盐分布特征、作物生长过程和干物质累积分配进行数值模拟.结果表明:(1)土壤含水率与土壤含盐量的模拟精度以20～100 cm 土层较好,0～20 cm 土层模拟精度较差,其中土壤含水量的模拟效果优于土壤含盐量;随着灌溉水源矿化度的增加,土壤含水率和含盐量的模拟误差逐渐变小.(2)不同矿化度水源膜下滴灌棉花叶面积指数模拟效果较好(R2=90.72％,RMSE=0.35 cm2·cm-2,NRMSE=8.73％,IOA=0.98).(3)不同矿化度水源膜下滴灌棉花茎干物质累积量模拟效果较好(R2=89.08％,RMSE=6.12 g,NRMSE=23.16％,IOA=0.96).研究结果表明,SWAP模型可以较好地对不同矿化度水源膜下滴灌的土壤水盐动态分布和棉花生长过程进行模拟.
Abstract
In order to build a dynamic distribution model of water and salt and cotton growth under drip irriga-tion in arid areas,based on the 2020-2021 field experiment,we conducted numerical simulation of soil water and salt distribution characteristics,crop growth process and material accumulation distribution under 1,2,3,4,5 and 6 g·L-1 treatments after calibration and verification of the SWAP model's soil,soil hydraulic function and crop growth modules.The results showed that:(1)The simulation accuracy of soil moisture content and soil salt content was better in 20～100 cm soil layer,but worse in 0～20 cm soil layer.The simulation effect of soil moisture content was better than that of soil salt content.With the increase of salinity of irrigation water source,the simulation error of soil water content and salt content decreases gradually.(2)The simulation effect of leaf area index of cotton un-der drip irrigation with different salinity water source was better(R2=90.72％,RMSE=0.35 cm2·cm-2,NRMSE=8.73％,IOA=0.98).(3)The simulation effect of cotton stem dry matter accumulation under drip irrigation with different salinity water source was good(R2=89.08％,RMSE=6.12 g,NRMSE=23.16％,IOA=0.96).The results show that SWAP model was able to simulate the dynamic distribution of water and salt and the growth process of cotton under drip irrigation with different salinity.
关键词
棉花/膜下滴灌/SWAP模型/水盐运移/作物生长/数值模拟Key words
cotton/drip irrigation/SWAP model/water and salt migration/crop growth/numerical simulation引用本文复制引用
基金项目
国家自然科学基金(52269006)
新疆生产建设兵团科技合作计划(2022BC001)
新疆生产建设兵团重点领域科技攻关计划(2022DB023)
新疆维吾尔自治区综合科学考察课题(第三次)(2021xjkk0804)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据