Effects Of Different Formulas Of Foliar Fertilizers On Crop Growth

Pot experiments were carried out to study the effects of different formulas of foliar fertilizers on the growth of rapeseed,tomato,chili,and green cabbage for providing the technical support to efficient foliar fertilization appling to get perfect quality,high yield and better economic benefit of crops.The main results are listed as follows:1 Treatment 4(nutrientsubstance+compound sodium nitrophenolate and DA-6+surfactant) had a biggest biomass and increments of leaves length and width and height of rapeseed seedlings among all the treatments.SPAD reading and photosynthetic rate of rapeseed seedlings were increased by 27.8%and 23.0%respectively in treatment 4 compared with the control.Moreover,N and K accumulations of rapeseed seedlings were increased by 31.1%and 31.3%respectively in treatment 4 compared with the control.To conclude,foliar fertilization with nutrientsubstance compound sodium nitrophenolate DA-6 and surfactant on rapeseed seedlings could increase its biomass and stimulate its growth.2 Application of Duoduo foliar fertilizers could increase tomato and chili yield,the increments being respectively 28.6%～85.7%and 12.0%～24.6%compared with control; Foliar applications of suitable concentration of BRs.and nutrient substances significantly increased plant growth,enhanced chlorophyll content and net photosynthetic rate of tomato and chili leaves and improved contents of Vc,soluble sugar,which increments being respectively 1.0%～27.4%and 7.6%～38.9%in tomato fruit as 15.8%～50.5%and 2.3%～39.4%in chili fruit compared with control,and decreased the content of organic acids in tomato fruit,thus improving fruit quality significantly.Foliar fertilization with nutrientsubstance microelements and BRs had the most optimum results.3 Foliar application of active organic liquids by extracting different composts with water and 0.5 mol·L^-1 K₂SO₄ improved green cabbage growth,promoted yield and improved quality.The extracts from pig manure compost had a maximum biomass crops and its increment was 10.8%compared with the control.Extracts from pig manure compost resulted in a better growth of green cabbage,more leaves,and higher yield than the extracts from other composts.Extracts from composts with 0.5 mol·L^-1 K₂SO₄ could significantly promote nutrients absorption,increase the content of Vc and soluble sugar,the increments being respectively 1.6%～42.0%and 4.2%～50.0%compared with the control and decrease nitrate content.4 Foliar application of the extracts from fungus residue compost mixed Nengzhuang foliar fertilizers and Duoduo foliar fertilizers increased the biomass of chili plants, significantly enhanced chlorophyll content of leaves compared with the control.