The objective of this study was to investigate the effects of different application rates of phytonutrients(compound oligosaccharides)and irrigation quotas on the growth,yield,quality and soil enzyme activity of greenhouse-grown tomatoes."Jiahong 100"was planted in a greenhouse,and three irrigation quotas were set up:5 550 m3·hm-2(W1)、6 375m3·hm-2(W2)、7 200 m3·hm-2(W3).Additionally,three compound oligosaccharide application rates:168 g·hm-2(P1),336 g·hm-2(P2)and 504 g·hm-2(P3),and CK treatment was used as the control group.A total of 10 treatments were used.The effects of different treatments on the growth,yield,quality and related enzyme activities in fruit tomato soil at maturity stage were determined and analyzed.The results show,Irrigation quotas and compound oligosaccharides had a certain effect on the growth of fruit tomatoes.The yield and irrigation water use efficiency of fruit tomato increased with the increase of irrigation quota and compound oligosaccharides.High irrigation quota would lead to the decrease of quality.Under the experimental conditions,when the irrigation quota is constant,the more complex oligosaccharides are applied,the more beneficial it is to improve the yield and quality.For urease in soil,higher dosage of complex oligosaccharides will increase its enzyme activity,with the p3 dosage of compound oligosaccharides has the best effect.However,too much irrigation quota will reduce its activity.For sucrase,the sucrase activity of W2P1 treatment was the highest,and the enzyme activity initially increased and then decreased with the increase of irrigation quota.In summary,W2P3(irrigation quota 6 375 m3·hm-2,compound oligosaccharide 504 g·hm-2)was recommended as the water-phytonutrient coupling mode for greenhouse fruit tomato cultivation in Wuzhong area,Ningxia Province.
维普
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