PJB-2017-634
Effects of emitter discharge and fertilizer rate on root growth and fruit yield of tomatoes in greenhouse
Xiukang Wang
Abstract
A greenhouse experiment was conducted to investigate the effect of emitter discharge and fertilizer rate on root growth and fruit yield on tomatoes (Lycopersicum esculentum Mill., cv. ‘Jinpeng 10’). Three levels of emitter discharge and three fertilization levels were combined with three replications of fertigation. The emitter discharge was significant for total root length, root weight, total root volume and root length of diameter than 2 mm. The fertilizer rate was significant effect of root surface area, total root volume and root weight. The fertilizer rate was more sensitive to root diameter than emitter discharge. The average yield of tomato fruit in E2 and E3 treatments were 10.52% and 16.03% lower than E1, respectively. The results showed that there was an obvious linear positive correlation between fruit yield and the root characteristics, and the coefficient of determination ranging from 0.531 to 0.941 and the intercept values ranged from 8.21 to 59.51. It is concluded that relatively high and similar fruit yield can be obtained with both emitter discharge and fertilizer amount management of tomatoes in solar greenhouses when careful management is used.
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