功能型水溶肥料配施对青菜生长发育及产量的影响OA

To study the effects of functional water-soluble fertilizers on the growth,development and yield of Brassica rapa var.chinensis,a field experiment was conducted in Songjiang District,Shanghai.The improved variety Jinpin 28 of Brassica rapa var.chinensis was used as the material,the conventional fertilization practiced in this area was used as the control(CK,no base fertilizer was applied,and 225 kg/hm2 of compound fertilizer with N∶P2O5∶K2O ratio of 25∶10∶16 was applied as a top dressing).3 treatments were set up on the basis of conventional fertilization:additional spraying of humic acid water-soluble fertilizer(K1,30 kg/hm2),amino acid water-soluble fertilizer(K2,1.2 L/hm2),and calcium-magnesium medium-element water-soluble fertilizer(K3,1.35 L/hm2).The agronomic traits such as plant height and tillering of the Brassica rapa var.chinensis,as well as the yield and economic benefits of each treatment were measured.The results showed that compared with conventional fertilization,the traits such as plant height,spread degree,maximum leaf length,and maximum leaf width of the vegetables in the K1,K2,and K3 treatments had all increased.The yields had increased by 7 900,9 200,and 8 200 kg/hm2 respectively,with yield increases of 13.2%,15.4%,and 13.7%respectively;the net benefits had increased by 9 260,12 430,and 11 030 yuan/hm2 respectively,with increase rates of 21.1%,28.3%,and 25.1%respectively.In summary,the application of functional water-soluble fertilizers containing humic acid,amino acids,and calcium-magnesium medium elements can promote the growth and development of vegetables,and has a positive effect on increasing Brassica rapa var.chinensis yields and production economic benefits.This research can provide a reference for the rational selection of water-soluble fertilizers in the production of Brassica rapa var.chinensis.