ABSTRACT
ABSTRACT: In agricultural production, the increasing usage of fertilizer has caused serious ecological environmental pollution. Rational fertilization is required to prevent fertilizer pollution, and optimum water-fertilizer coupling can achieve the highest utilization efficiency and lowest loss of fertilizer. This paper researches the effects on yield, quality and soil available potassium of tomato in greenhouse under different kinds of potassium fertilizer (potassium nitrate and potassium sulfate), different K fertilizer rates(0 kg/hm2, 315 kg/hm2, 510 kg/hm2) and two methods of irrigation(drip irrigation and furrow irrigation). The result shows that the yield of T2 is the highest, and so is the content of soluble sugar. Content of VC and soluble sugar in fertilized tomatoes are higher than the ones not fertilized. Considering the yield and quality, it’s better to adopt drip irrigation and apply the potassium sulfate whose amount is 315 kg/hm2, which can obtain higher yield and better quality of tomato in greenhouse.
