Regulation Effects Of Different Water Soluble Fertilizers And Application On Yield Of Peanut Under The Condition Of Fertigation

In order to explore the efficient fertigation of peanut,study the regulation effects of different water soluble fertilizers,application amounts and fertilization period on yield of peanut under the condition of fertigation.Using shanhua 9 as the test material,two planting patterns of spring sowing and summer sowing were set.By studying the agronomic characters,yield and yield components factors of peanut plant growth,nitrogen,phosphorus and potassium nutrient content of plant organs,seed kernel quality,and fertilization benefits,etc.,selecting high quality fertilization scheme,it provides theoretical basis for high yield and high efficiency cultivation of peanut.The main research is as follows:(1)Water soluble fertilizers type screeningThree kinds of water soluble fertilizers including high phosphorus(10-40-10),balanced fertilization(20-20-20),high nitrogen(30-10-10)compared with the traditional base and white space handling are to improve plant agronomic characters and yield production,among them with NPK ratio for balanced fertilization(20-20-20)of the optimal water soluble fertilizers effect,spring sowing pods yield was 24.5%higher than white space handling,seed kernel yield was 40.17%higher than white space handling,and can significantly promote the growth of main stem and side branch,increase dry matter accumulation and the pods dry matter distribution rate,and increase the protein and fat content in the seed kernel,improve the pod kernel.(2)Water soluble fertilizers reducing the suitable amount of fertilizerWith the loss of the fertilizer application amounts,the agronomic characters of plant,dry matter accumulation and pod and seed kernel yield were showing a trend of increasing first and then decreasing,when the fertilizer application amounts of 270 kg/hm~2,peanut pods yield and seed kernel yield are the highest,respectively,spring sowing 4909.65 kg/hm~2 and 3450.45kg/hm~2,but when the fertilizer application amounts of 202.5 kg/hm~2,highest fertilization benefits is 2559.68 rmb/hm~2,so in fertilizer application amounts range of 202.5~270 kg/hm~2,plant main stem height and the side branch length increased significantly,dry matter accumulation increased,The pod yield and kernel yield increased significantly,and the fertilization benefits was high,which was a reasonable range of fertilizer application amounts.(3)Fertilization proportion in each growth period under the condition of reduced fertilizationTop application at pod pin stage by 50%was beneficial to increase vegetative growth of plants,while top application at pod filling stage by 20%was beneficial to pod development and reproductive growth.Top application at each growth stage was beneficial to increase the main stem height and side branch length,increase the dry matter accumulation and plant nutrient content.When the fertilization amount was 202.5kg/hm~2,and the fertilization ratio in each growth period was Flowering and pegging:Pod-setting:Pod mature=50:30:20,the pod yield was 41.59%higher than white space handling,and 21.44%higher than traditional basal application,and the highest fertilization benefits was 5837.93 rmb/hm~2,which was the most appropriate application amounts and fertilization ratio.