| 西葫芦微咸水膜下滴灌土壤水盐运移对产量影响的预测模型 |
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| 引用本文： | 郭向红,毕远杰,孙西欢,马娟娟,孔晓燕.西葫芦微咸水膜下滴灌土壤水盐运移对产量影响的预测模型[J].农业工程学报,2019,35(8):167-175. |
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| 作者姓名： | 郭向红 毕远杰 孙西欢 马娟娟 孔晓燕 |
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| 作者单位： | 1. 太原理工大学水利科学与工程学院，太原 030024,2. 山西省水利水电科学研究院，太原 030002；,1. 太原理工大学水利科学与工程学院，太原 030024；3. 晋中学院，晋中 030619,1. 太原理工大学水利科学与工程学院，太原 030024,1. 太原理工大学水利科学与工程学院，太原 030024 |
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| 基金项目： | 国家自然科学基金项目（51209131）和山西省自然科学基金项目（201601D011053） |
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| 摘 要： | 为了定量计算微咸水膜下滴灌对土壤水盐和西葫芦产量的影响,根据微咸水膜下滴灌土壤水盐运移特点和西葫芦生长试验,建立了西葫芦微咸水膜下滴灌土壤水盐运移模型和水盐生产函数,并将二者联立,建立了西葫芦微咸水膜下滴灌土壤水盐运移对产量影响的预测模型。利用西葫芦微咸水膜下滴灌水盐试验数据对模型进行验证,结果表明模型计算的西葫芦微咸水膜下滴灌土壤含水率和土壤含盐量与实测土壤含水率和土壤含盐量的变化趋势一致,模型计算土壤含水率、土壤含盐量和西葫芦产量的均方根误差分别为0.049 cm~3/cm~3、0.065 g/kg和3.83 t/hm~2,土壤含水率、土壤含盐量和西葫芦产量的平均相对误差分别为5.17%、7.42%和5.84%,土壤含水率、土壤含盐量和西葫芦产量的平均绝对误差分别为0.047 cm~3/cm~3、0.062 g/kg和3.95 t/hm~2。所建的模型具有较高的模拟精度,可用于模拟西葫芦微咸水膜下滴灌土壤水盐动态和西葫芦产量。
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| 关 键 词： | 土壤 水 盐 产量 西葫芦 微咸水 膜下滴灌 |
| 收稿时间： | 2018/7/12 0:00:00 |
| 修稿时间： | 2019/3/18 0:00:00 |
Prediction model of soil water and salt transport on yield of summer squash under mulch drip irrigation with brackish water |
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| Guo Xianghong,Bi Yuanjie,Sun Xihuan,Ma Juanjuan and Kong Xiaoyan.Prediction model of soil water and salt transport on yield of summer squash under mulch drip irrigation with brackish water[J].Transactions of the Chinese Society of Agricultural Engineering,2019,35(8):167-175. |
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| Authors: | Guo Xianghong Bi Yuanjie Sun Xihuan Ma Juanjuan and Kong Xiaoyan |
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| Institution: | 1. College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;,2. Shanxi Institute of Water Resources and Hydropower Research, Taiyuan 030002, China;,1. College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 3. Jinzhong University, Jinzhong 030619, China,1. College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; and 1. College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; |
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| Abstract: | Abstract: Water resources are very scarce in northern China. In order to improve the utilization efficiency of brackish water and agricultural water resources, Mulch drip irrigation with brackish water has been widely studied. Mulch drip irrigation with brackish water is a highly efficient irrigation technology that combines brackish water and mulch drip irrigation, which not only saves water but also makes full use of brackish water resources. In order to quantitatively calculate the effects of mulch drip irrigation with brackish water on soil water salt and summer squash yield, the water salt transport model and water salt production function of mulch drip irrigation with brackish water were established according to the characteristics of soil water-salt transport under mulch drip irrigation with brackish and summer squash growth experiment. A prediction simulation model of soil water-salt transport and yield was established by combining the two models under mulch drip irrigation with brackish water. In order to verify the model, experiments with two groups of summer squash under mulch drip irrigation with brackish water were carried out. The first group was the growth experiment of summer squash under mulch drip irrigation with different salinity of brackish water (1.7, 3.5, 5.0 g/L). The second experiment was to study the effects of different irrigation levels and different salinity of brackish water on the growth of summer squash under mulch drip irrigation. Three irrigation levels were set at seedling stage, vine-pumping stage and flowering and fruiting stage, namely 70%-90% of field water holding capacity, 60%-80% of field water holding capacity, 50%-70% of field water holding capacity, respectively. The three levels of irrigation salinity were 1.7 g/L, 3.5 g/L and 5.0 g/L, respectively. A total of nine treatments were designed by orthogonal experiment. The results showed that the soil water content, soil salt content and yield of the summer squash calculated by the model was in agreement with the trend of the measured soil water content, soil salt content and yield of the summer squash under mulch drip irrigation with brackish water. The root mean square error of the soil water content, soil salt content and yield of the summer squash calculated by the model was 0.049 cm3/cm3, 0.065 g/kg and 3.83 t/hm2, respectively. The average relative error of the soil water content, soil salt content and yield of the summer squash calculated by the model was respectively 5.17%, 7.42% and 5.84%, and the average absolute error of the soil water content, soil salt content and yield of the summer squash calculated by the model was respectively 0.047 cm3/cm3, 0.062 g/kg and 3.95 t/hm2. Therefore, the model had higher simulation accuracy and can be used to simulate the distribution and dynamic changes of soil water-salt and yield of summer squash under mulch drip irrigation with brackish water. The optimum scheme of drip irrigation under film with brackish water for summer squash was obtained by range method. The soil water content at seedling stage was controlled at 70%-90% of field water holding capacity, at sprouting stage was controlled at 60% - 80% of field water holding capacity, at flowering and fruiting stage was controlled at 60% - 80% of field water holding capacity, and the salinity of brackish water was 1.7 g/L. However, brackish water with salinity of 3.5 g/L can also be used for irrigation in areas where freshwater resources are very scarce. |
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| Keywords: | soils water salt yield summer squash brackish water mulch drip irrigation |
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