Effects of Nitrogen on Growth and Fruit Yield of Cucumber

The changes of growth and fruit yield of different cucumber varieties under four level of nitrogen,i.e.,0,80,240,400kg.hm-2 were studied.The results showed that when the nitrogen increased,the leaf area index,chlorophyll content,concentrates of petiole sap of leaves and fruits had gradually advanced.Under the 240kg.hm-2 nitrogen level,the photosynthetic rate,stomatal conductance of cucumber reached the maximum,and the fruit yield was also the highest.'Jinqing 10' and 'Jili Shisi' had the consistent response under different nitrogen conditions.