| This article has been：Browse 2079Times Download 3324Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.20190125 |
|
| Impact of Water-Fertilizer-Air-Heat Coupling on Photosynthetic and Yield of Pepper in Greenhouse |
|
ZHAO Ce, TIAN Juncang, OUYANG Zan, YAN Xinfang
|
|
1.College of Civil and Hydraulic Engineering,NingxiaUniversity, Yinchuan 750021, China;2. Ningxia Engineering Technology Research Center of Water-saving Irrigation and Water Resources for Modern Agriculture in Arid Areas, Yinchuan 750021, China; 3. Center of Engineering Research on Efficient Utilization of Water Resources in Modern Agriculture in Arid Regions (Ministry of Education),Yinchuan 750021, China
|
| Abstract: |
| 【Objective】The aim is to explore the effects of water, fertilizer, air and heat coupling in soil on growth, photosynthesis and yield of pepper under solar greenhouse conditions. 【Method】 Under the condition of non-cultivated solar greenhouse, through the four factors and three levels orthogonal test, according to the results of range and variance analysis, we have produced the order of influence of four factors, the significance, the influence trend of each factor and the optimal combination. And, irrigation quota has a significant impact on many indicators, and it is the main factor. 【Result】 The results of yield analysis are as follows: the order of four factors is irrigation quota > fertilization quota > dissolved oxygen > water temperature of geothermal pipe; the effect of irrigation quota is very significant, fertilization quota is significant, and dissolved oxygen and geothermal pipe water temperature is not significant. 【Conclusion】 Combining the influence of irrigation quota, fertilizer quota, dissolved oxygen and water temperature of geothermal pipe on Photosynthesis and yield of pepper, the optimum level combination was determined to be A3B2C1D3, and irrigation quota is 210 m3/hm2, fertilizer quota is 75 kg/hm2, dissolved oxygen is 7.5 mg/L, and water temperature of geothermal pipe is 37 ℃. The total irrigation times were 36, and the irrigation quota was 7 560 m3/hm2. The yield of pepper was the highest under this combination mode, reaching 58 597.40 kg/hm2. The yield of the optimum treatment increased by 45.17% compared with the control treatment. The coupling regulation of water, fertilizer, air and heat in soil can provide theoretical basis and technical support for improving quality and efficiency of greenhouse vegetables and precise water-saving irrigation. |
| Key words: solar greenhouse; irrigation under plastic film; water-fertilizer-air-heat coupling; pepper; photosynthesis |
|
|
