Effect Of Different Water Fertilizer Ratio On Growth And Nutrient Status Of Sugarcane

The purpose of this study was to further investigate the effects of different coupling rates on the agronomic traits such as yield and quality of sugarcane,absorption and utilization of nitrogen,phosphorus and potassium as well as soil nutrient elements.In 2017,the grand field test is carried out at the longduotun test base in taiping town,jiangzhou district,chongzuo city,guangxi zhuang autonomous region.Field trials have 1 kind of blank controlled trials(CK treatment:top application and irrigation,according to the conventional method for planting,pesticide and other regular management)and three different topdressing fertilizer consumption coupling water treatment(WF1 processing:planting,administer routine management as identical as CK,WF2 handling 70%of the top application quantity,80%of irrigation water for WF2 processing;WF2 treatment:the following routine management is the same as CK,with the same as CK:N:292.95kg hm-2,P2O5:146.475kg hm-2,K2O:439.425kg hm-2,and the irrigation amount is 437.175m3 hm-2.WF3 treatment:the following routine management is the same as CK,and the amount of fertilizer is 130%of WF2 treatment and 150%of WF2 treatment.In accordance with the law of Chinese sugarcane varieties method determination of sugar cane agronomic traits,and measure the soil soil nutrient content at different development stages,and each part of the plant above ground NPK content to calculate,NPK uptake analyses different after water fertilizer consumption coupling on the sugarcane yield and quality of agronomic traits,NPK nutrient elements uptake and soil nutrient elements.The results showed that:(1)With different water fertilizer consumption coupling treatment of each index and yield and quality indexes are better than that of ck treatment,and the sugarcane single stem weight,yield and sucrose are first increased with the increase of chasing the amount of fertilizer,after overall WF2 processing various growth index and yield and quality index is better than that of WF1 and WF2 processing.Therefore,the optimum coupling treatment of water and fertilizer is WF2.(2)The productivity of N,P and K was decreased with the increase of the amount of water nitrogen.The agronomic efficiency of N,P and K fertilizer increased with the increase of the amount of water and nitrogen.The recovery rate of N,P and K was decreased with the increase of the amount of nitrogen.In terms of fertilizer utilization data,WF2 treatment is better than WF1 and WF3 processing.(3)The accumulation of nitrogen,phosphorus and potassium in each part of sugarcane is better than that of blank control.The accumulation of nitrogen,phosphorus and potassium in sugarcane shoots was mainly concentrated in sug'arcane stems,and WF2 treatment was generally better than WF1 and WF3 treatments.(4)the nutrient content of the 20-40cm soil layer is significantly higher than that of 0-20cm and 40-60cm soil layer;Soil nutrient content increased from seedling stage to tillering stage,and decreased from tillering stage to process maturity.Therefore,from the Angle of the agronomic characters,nutrient utilization rate and nutrient accumulation of sugarcane,WF2 was treated as the best water catchment.