Effect of Topdressing Different Types of Nitrogen Fertilizer on Growth and Yield of Intercropped Peanut with Wheat
To study the effects of different types of nitrogen fertilizer on the growth and yield of intercropped peanut in sandy soil,the field experiment was conducted in Xinxiang City of Henan Province.7 treatments were set,including no fertilizer control(CK),ammonium chloride(AN),ammonium sulfate(AS),calcium ammonium nitrate(CAN),urea(UR),humic acid urea(UHA)and controlled-release urea(SRU).The plant height,branch number,compound leaf number,dry matter and pod yield of peanut were investigated.The results showed that,compared with CK,the plant heights of peanut in different stages were increased by all the N fertilizer types.The plant height of UR treatment was relative higher in all growth periods,and were higher in the later growth period under UHA and SRU treatments.The application of N fertilizer could promote the peanut branching,with great increase for AS,UR and SRU treatments before the needling stage.The N fertilizer application significantly affected the number of compound leaves of peanut.The number of compound leaves was less in the early growth stage but more in the late stage for AS and CAN treatments,while were more in the early stage but less in the mature stage for UHA and SRU treatments,the number of compound leaves for AN and UR were relative stable.The N fertilization significantly increased the dry matter accumulation at fruit swelling and maturity stages.Compared with CK,application of N fertilizer increased the yield by 25.0%～61.0%,with the greatest increase by CAN and UHA treatments.The yield increase for UR and SRU treatments were higher than AS and AN.The CAN,UR and SRU treatments significantly decreased bad fruit rate of peanut than other treatments.In conclusion,N fertilizer application could promote the growth and yield of intercropped peanut with wheat,with the best effect for CAN,followed by UHA and SRU.
万方数据
维普
