Influences of Different Fertilization Structures on Yield and Nutrients Uptake and Nutrients Use Efficiency of Two kinds of Leafy Vegetable

In order to achieve the goals of precise fertilization and developing special formula fertilizer for crops, a field plot experiment and a laboratory analysis were conducted to study the influences of different fertilization structures on yield and nutrients uptake and nutrients use efficiency of two kinds of leafy vegetable(Chinese cabbage and cabbage) in vegetable producing base in the Dongting Lake plain area. The results showed that combined application of organic fertilizer can significantly increase the yield of vegetables; in comparison with non-fertilization treatment and pure chemical fertilizer treatment, the yield of Chinese cabbage averagely increased by 32.2% and 18.2%, and the yield of cabbage averagely increased by 53.3% and 7.8%, respectively. Combined application of organic fertilizer also can increase the nutrients uptake amount and nutrients use efficiency; in comparison with local common fertilization treatment, the use efficiency of cabbage to nitrogen and phosphor in the tree treatments of combined application of organic fertilizer increased by 21.6% and 10.0%, respectively; in comparison with pure fertilizer treatment, the use efficiency of cabbage to nitrogen,phosphor and kalium in the tree treatments of combined application of organic fertilizer increased by 17.2%, 10.2% and17.9%, respectively; the use efficiency of Chinese cabbage to nitrogen and phosphor in the tree treatments of combined application of organic fertilizer increased by 23.2% and 16.1%, respectively; in comparison with pure fertilizer treatment,the use efficiency of Chinese cabbage to nitrogen, phosphor and kalium in the tree treatments of combined application of organic fertilizer increased by 26.7%, 13.6% and 22.2%, respectively. According to the nutrients uptake results of the two vegetables, the balance fertilization parameters of the two vegetables were calculated by using balance fertilization theory,the ratio of N to P2O5 to K2O was 1.00∶0.53∶1.14 for cabbage and 1.00∶0.50∶1.07 for Chinese cabbage.