The Influence Mechanism of Vegetable Waste Fermentation Broth on Lettuce Growth
In order to solve the problem of treating a large of facility vegetable waste,its fermentation liquid as liquid fertilizer and soil conditioner and its action mechanism were studied.The fermentation broth was made from the tomato vine crushed with the enzyme and brown sugar added,and the main components were determined.Organic acids and nutrients in the fermentation broth were replaced by lactic acid,ammonium sulfate,monopotassium phosphate and potassium sulfate.The results showed that the content of available nutrients in the soil can be increased with the application of fermentation broth,lactic acid and fertilizer.Compared with the reference test,fermentation broth with 100％could increase available phosphorus in the soil by 29.8％and fermentation broth with 67％could increase available potassium by 20.9％.The application of fermentation broth not only increased the yield but also improved the quality of lettuce.After the application the content of soluble sugar in lettuce leaves was increased and the nitrate was decreased.By comparing and analyzing the growth effect of lettuce and the physical and chemical properties of soil,it was found that the effect of the fermentation liquid of vegetable waste on the growth of lettuce was mainly the activation effect of lactic acid on soil available phosphorus and available potassium,which can improve the soil nutrient content and yield of lettuce.And the fermentation liquid can improve the agronomic characters of lettuce.
万方数据
维普
