Coupling Effects of Irrigation and Fertilizers on Photosynthetic Rate of Tomato Leaves
The effects of irrigation and fertilizers on photosynthetic rate of tomato leaves were investigated in this paper.Using pot experiment and quadratic orthogonal regressive rotation design with five factors,a regression model of irrigation,N,P,K and organic fertilizer on photosynthetic rate of tomato leaves was given.The relationship between photosynthetic rate and irrigation volume could be estimated with a second-degree parabola opening upwards.With nitrogen,phosphorus,potassium and organic manure fertilizer rate being increased,photosynthetic rate was dropped at first and then eventually increased.There were negative interaction effects between irrigation volume and nitrogen fertilizer rate,irrigation volume and phosphorus fertilizer rate,while irrigation volume and organic manure fertilizer rate,nitrogen and potassium fertilizer rate,nitrogen and organic manure fertilizer rate,potassium and organic manure fertilizer rate were the opposite effects.The photosynthetic rate of tomato leaves could be promoted or inhibited by irrigation volume and fertilizer rates of nitrogen,phosphorus,potassium and manure.Only with the reasonable water-fertilizer management measures,the photosynthetic rate of tomato leaves could be increased significantly.
photosynthetic rateirrigation volumefertilizer rates of nitrogen,phosphorus,potassium and manurequadratic orthogonal regressive rotation design with five factorstomato
NETL
NSTL
万方数据
维普
