| Humic acid water-soluble fertilizer is a new type of fertilizer.Compared with traditional fertilizer,it has the characteristics of high fertilizer efficiency,low concentration,no burning of seedlings,no root damage,high efficiency,rapid absorption and so on.It plays an important role in improving crop yield and agricultural product quality.Based on conventional crop fertilization,this study applied different concentrations of humic acid type large amount of element water-soluble fertilizer to study the effects of cucumber and tomato on the growth,yield and quality of cucumber and tomato in Shandong Province and Shanxi Province in 2022.With local conventional application and clean water as control treatment,three different concentration gradients of humic acid type water-soluble fertilizer were set,which were 35g/ mu,70g/ mu and140g/ mu respectively.The results were as follows:(1)Humic acid water-soluble fertilizer could promote the growth and development of cucumber and tomato.Applying humic acid water-soluble fertilizer with 140g/ mu concentration,compared with conventional fertilization control group,cucumber plant height increased by26%,stem diameter increased by 12%,leaf area increased by 12%,and leaf SPAD value increased by 32%.In tomato,plant height increased by 4% and stem diameter increased by 20%when 70g/ mu was applied,leaf area increased by 25% and leaf SPAD value increased by 46%when 140g/ mu was applied.When the fertilization concentration reached 140g/ mu,plant height and stem diameter rebounded.This suggests that too high a concentration may have an adverse effect on tomato growth,so the appropriate fertilizer concentration should be determined on a case-by-case basis and excessive fertilization should be avoided.(2)Water soluble fertilizer with large amount of elements of humic acid could promote the number of fruit and yield of cucumber and tomato.Applying the concentration of 70g/ mu was the best for the number of fruit and yield of cucumber and tomato.Compared with conventional fertilization control group,the number of fruit and yield of cucumber increased by 127% and198%.The fruit number and yield of tomato increased by 53% and 115%,indicating that humic acid water-soluble fertilizer can promote pollen germination and pollen tube growth of cucumber,increase pollination success rate,and thus improve the fruit number and yield of cucumber.(3)The quality of cucumber and tomato can be significantly improved by water soluble fertilizer with a large amount of elements of humic acid.When the concentration of 70g/ mu was applied,the soluble sugar,soluble protein,VC and organic acid of cucumber increased by 26%,160%,35% and 260% compared with the conventional fertilization control group.Compared with the conventional fertilization control group,the soluble sugar,soluble protein and VC increased by24%,97% and 39% at the concentration of 140g/ mu,while the organic acid increased by 160%at the concentration of 70g/ mu.Pay attention to proper concentration,can effectively improve the quality of crops.To put forward reasonable suggestions for the popularization and application of humic acid water-soluble fertilizer,and promote the use of humic acid water-soluble fertilizer through educational activities and advertising campaigns in schools,universities and agricultural extension offices.Questionnaires will be conducted to collect data on current use,satisfaction and factors influencing use by farmers and gardeners,and the results will be used to raise awareness and address the use of humic acid-type water-soluble fertilizers.To sum up,the application of humic acid type water soluble fertilizer technical indicators:N+P2O5+K2O ≥ 200g/L,potassium humate ≥ 30g/L(N ≥ 60g/L,P2O5 ≥ 40g/L,K2 O ≥100g/L),concentration of 35g/ mu,too low or too low concentration will lead to the lack of nutrients in cucumber and tomato,slow growth;When the concentration is 140g/ mu,excessive concentration may lead to chemical damage and poor growth of cucumber and tomato.When the concentration is 70g/ mu,the growth,development and yield of cucumber and tomato can be improved better,so it is suggested to be popularized and applied as the main fertilization concentration. |
