| Effects of foliar fertilizer on fruit quality and the effects of root fertilization on soil microorganism,the enzymes’ activity were studied using the pears as materials.The results were as the follows:1.Several quality indicators of pears sprayed by diffent photosynthetic bacteria agent was improved.The weight of single fruit and the concents of soluble sugar,soluble solids content,and VC in pears treated with four biological fertilizer increased with varying degrees.But the longitudinal diameter and the contents of fruit stone cell,cellulose and orther indicator were not influced obviously by the fertilizers.These indicated that single bacterial manure couldn’t improve the comprehensive quality of pears.In order to improve the quality of pear fruit,the comprehensive measures of leaf fertilizing,soil fertilizing and tree management must be adopted.2.The quantity of bacteria,fiber-decomposing bacteria and actinomycetes in the soil which fertilized with bacillus subtilis,reast bacterium resistance to continuous cropping and VT-100 bacteria growed and the quantity of bacteria had the biggest rise.In addition,the number of ammonification bacteria in bacteria was the highest,produce promoting effect for the growth of denitrification,ammoniation,anaerobic cellulose decomposing bacteria and actinomycetes.This has a inhibitory effect on the breeding of nitrosation bacteria azotobacteriaandaerobia cellulosedecomposing bacteria.Among the four bacteria fertilizers,it is the yeast bacterium resistance to continuous cropping agent that has the greatest influence on the soil microbial quantity and the improvement of the soil biological community structure.The improvent effect of VT-100 agent is the second,bacillus subtilis is the third.Actinomycetes was in center,the least one was fiber decomposition bacteria.The number of microorganisms in the soil was decreased in different degree,it couldn’t improve the soil biological community structure.3.Among the four kinds fertilizer treatments,they all increase catalase activity,polyphend oxidase activity and ocid phatase activity:By applying VT-100 bacteria fertilize,several kinds of soil enzyme activities investigated raise to various extent,among them catalase activity and asparaginase activityhave obviously increased,and increment are 83.67 percent and 9percentrespectivety;The effects on polyphend oxidase activity and amylase activity are the best by applying yeastbacterium resistance to continuous cropping agent.Using the method of grading,comprehensive evaluation on the effect of bacteria fertilizer treatments find :The comprehensive effect of applying biological bacterium VT-100 is the best.The influence on the soil enzyme activity is relatively the least,applying bacituas subtilis fertilizer treatments. |
