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| Effects of water-fertilizer-air-heat coupling on yield and photosynthesis of wolfberry |
| ZHU He1, TIAN Juncang1,2,3*, YANG Fan1, MA Bo1,2,3, YAN Xinfang1,2,3, HAO Xiangfeng4 |
| 1. School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan, Ningxia 750021, China; 2. Engineering Technology Research Center of Water-saving and Water Resource Regulation in Ningxia, Yinchuan, Ningxia 750021, China; 3. Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions, Ministry of Education, Yinchuan, Ningxia 750021, China; 4. Beryl Wolfberry Limited by Share Ltd, Yinchuan, Ningxia 750200, China |
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Abstract In order to explore the effect of water-fertilizer-air-heat coupling on the photosynthesis index and yield of wolfberry, four-factors three-level orthogonal design method and combine with range analysis and variance analysis was used. The coupling of soil water, fertilizer, air and heat has certain effects on the yield, water use efficiency and photosynthesis of wolfberry. The comprehensive adjustment measures of soil water, fertilizer, air and heat had a positive effects on the yield and photosynthesis of wolfberry. Under the conditions of rainfall of 135.1 mm during the growth period of wolfberry, sandy loam soil and drip irrigation, the determined optimal combination of soil water, fertilizer, air and heat suitable for local wolfberry was A1B1C1D1. The soil was deeply ploughed to adjust the aeration, the irrigation quota was 4 815 m3/hm2, and top dressing amount is high fertilizer(pure nitrogen amount 1 395 kg/hm2, pure phosphorus amount 360 kg/hm2, pure potassium amount 270 kg/hm2), and PP non-woven fabric is covered to increase temperature and suppress grass. Under the optimal combination, the yield can reach 9 281.55 kg/hm2, which is an increase of 25.37% compared with the control. At the same time, the photosynthesis of wolfberry plants is strong and the fruit quality is better. This conclusion provides a theoretical basis for the efficient utilization of water, fertilizer, air, and heat in wolfberry soil and the improvement of quality and efficiency.
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Received: 07 June 2020
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