Effect of Soil Water Content on Yield,Absorption and Distribution of N,P and K in Tomato with Different Cultivation Seasons

In order to clarify tomato requirement characteristics of fertilizer and water in different cultivation seasons,the effects of soil water content on plant growth,absorption and distribution of nitrogen,phosphorus and potassium were studied by potted tomatoes with different cultivation seasons by main effect analysis. The results showed that cultivation season and soil water content had significant effects on plant growth,yield and absorption of nitrogen,phosphorus and potassium,and their interactions were also significant. In comparison to autumn-winter tomato,winter-spring tomato performed stronger vigor,and its yield per plant was higher by 40. 23%,absorption rates of N,P and K were increased by 118. 97%,125. 23% and 146. 14% respectively,and absorption amount were raised by 65. 32%,70. 68% and85. 99%. The distribution rates of N,P and K in stem and leaf of winter-spring tomato were improved,and their distribution rates in fruit were raised in autumn-winter tomato. With decrease of soil water content,plant growth,absorption amount and rate of N,P and K were reduced,and lower soil water content favored the distribution of N,P and K in fruits. The yield per plant with the treatment of soil water content of 65% was highest in autumn-winter tomato,but in winter-spring tomato yield per plant was highest in soil water content of 80%. This study provided the theoretical basis for high yield and guality cultivation of tomato.