Effects of Different Water-holding Agents on the Growth,Yield and Quality of Tomatoes using Substrate Culture in Gobi Solar Greenhouse
To study the effects of adding different water-retaining agents on tomato growth,quality and yield,and to provide technical basis for reasonable addition of water-retaining agents in tomato substrate production in Gobi solar greenhouse,Jiufan 6 was used as the test material and 3 treatments were set,i.e.,no water retaining agent,90 kg/ha attapulgite and 90 kg/ha polymer resin,under normal irrigation level.One week after colonization,there were 3 treatments i.e.,no water retaining agent,90 kg/ha attapulgite and 90 kg/ha polymer resin at the reduced irrigation level of 15%,and a total of 6 treatments were performed to explore the effects of different water-retaining agents on the growth,quality,and yield of tomatoes.Results showed that under normal irrigation level,yields of tomatoes treated with 90 kg/ha attapulgite and 90 kg/ha polymer resin were increased by 5.67%to 5.85%.Contents of soluble sugar,soluble protein,vitamin C,soluble solid and water use efficiency were increased by 10.83%to 12.50%,11.88%to 38.61%,1.98%to 2.20%,7.74%to 13.47%and 5.70%to 5.89%,respectively.The yield of tomatoes treated with 90 kg/ha attapulgite and 90 kg/ha polymer resin increased by 8.65%to 15.48%at the reduced irrigation level of 15%.Contents of soluble sugar,soluble protein,vitamin C and water use efficiency were increased by 30.50%to 37.24%,70.14%to 84.86%,15.83%to 18.38%and 8.64%to 15.50%,respectively,while soluble solid content was decreased by 3.36%to 17.75%.Adding water-retaining agent can significantly promote tomato plant growth,increase yield and improve fruit quality.Principal component analysis showed that under normal irrigation level(4 500 m3/ha),adding 90 kg/ha polymer resin had the best effect.
TomatoWater retaining agentGobi solar greenhouseSubstrate cultureYieldQualityWater use efficiency
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