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coupling model and optimal combination scheme of water,fertilizer,dissolved oxygen and temperature in greenhouse tomato under drip irrigation

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International Journal of Agricultural and Biological Engineering 2021年第9期14卷 37-46页

作者： Zan Ouyang Juncang Tian Ce Zhao Xinfang Yan School of Civil and Hydraulic Engineering Ningxia UniversityYinchuan 750021China Engineering Technology Research Center of water-Saving Irrigation and water Resource Regulation in Ningxia Ningxia UniversityYinchuan 750021China Engineering Research Center for Efficient Utilization of Modern Agricultural water Resources in Arid Regions Ministry of EducationNingxia UniversityYinchuan 750021China

water-fertilizer coupling technology has been widely used in the *** soil aeration,low temperature or high temperature can affect the rate of nutrient uptake by crop *** at the interaction between water,fertilizer,dissolved oxygen and temperature(WFOT)coupling model and irrigation flux of tomato in greenhouse,using these four factors with a five-level uniform-precision rotatable central composite design,a mathematical model was established among the four factors affecting tomato yield in a greenhouse,and the optimal combination scheme of WFOT was *** the test range,tomato yields increased with increasing irrigation quotas(X_(1)),fertilization amount(X_(2)),dissolved oxygen(X_(3))and geothermal pipe water temperature(X_(4)).The magnitude of the effect of each factor of WFOT on tomato yield was in the following order:X_(1),X_(2),X_(4),X_(3)(spring and summer),and X_(1),X_(3),X_(2),X_(4)(autumn and winter).The interaction between high water-low heat and low water-high heat were beneficial for yield increase(spring and summer),the high fertilizer-low heat and low fertilizer-high heat interactions were beneficial to yield increase(autumn and winter).If WFOT agronomic measures were adopted according to the 95%confidence interval,there was a 95%probability that the spring-summer tomato yield will be higher than 89902 kg/hm^(2).The WFOT coupling scheme was X_(1)of 4808-5091 m3/hm^(2),X_(2)(N-P_(2)O_(5)-K_(2)O)of 171-57-84 to 186-62-89 kg/hm^(2),X_(3)of 7.9-8.2 mg/L,and X_(4)of 34.9°C-37.0°*** was a 95%probability of tomato yield higher than 85209 kg/hm^(2)in autumn and winter,and the WFOT coupling scheme was X_(1)of 5270-5416 m3/hm^(2),X_(2)(N-P_(2)O_(5)-K_(2)O)of 151-50-76 to 167-56-82 kg/hm^(2),X_(3)of 8.0-8.2 mg/L,and X_(4)of 34.1°C-36.2°***,and the model had a very good simulation effect,with application *** relative error between spring-summer and autumn-winter yields ranged from 1.12%to 25.34%.The results of the study can pr

关键词： aeration irrigation soil warming water-fertilizer-dissolved oxygen-temperature coupling model optimal combination scheme

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