Effects of CO<sub>2</sub> enrichment by fermentation of agricultural organic wastes on the yield and quality of tomato in the greenhouse
2009
FAN Lin | DU Shao-ting | HUANG Li-dong | CHEN Yi-ding | ZHANG Yong-song
A field experiment was carried out to study the effects of CO<sub>2</sub> enrichment by fermentation of organic wastes (swine feces and rice straw) on the growth, yield and quality of tomato (Lycopersicon esculentum Mill cv. Jinpeng) in the greenhouses. The results show that CO<sub>2</sub> enrichment could promote significantly tomato growth and increase fruit number and single fruit mass, resulting in 15 days predated for harvest, and the increases of total yield, post-harvested yield, total income and net income by 43.8%, 220%, 68.8% and 66.1%, respectively. Furthermore, the quality of tomato fruit was obviously improved by CO<sub>2</sub> enrichment, of which the color of appearance, plumpness and taste of the fruit were much better than that of the control. Besides, the contents of soluble sugar, vitamin C, soluble solid and sugar/acid ratio were significantly increased, while nitrate content was decreased. In conclusion, CO<sub>2</sub> enrichment via the fermentation of agricultural organic wastes in greenhouses provides a new strategy for safe agricultural production, which not only solves CO<sub>2</sub> deficiency in the greenhouse and thereby bring high economic benefits to farmers, but also minimizes the organic wastes pollution to the environment.
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