Effects of potassium humate on soil improvement,tree growth and fruiting of Chinese bay-berry(Myrica rubra)
In recent years,the soil environment of Chinese bayberry growing area has been deteriorated,which has led to the poor growth of tree and fruit quality decline.In order to solve the above problems,the effect of potassium humate was examined in the bayberry planting area.The changes of soil physical and chemical properties,soil micro-bial biomass carbon content,soil microbial biomass nitrogen content,soil enzymes activities,nutrients contents in stems and leaves,fruit yield and quality were determined with application of different amounts of potassium humate.It was shown that application of potassium humate could significantly(P＜0.05)increase the pH value,cation ex-change capacity,electrical conductivity and maximum water holding capacity of soil,increase the contents of soil a-vailable nitrogen,soil available potaasium and soil exchangeable calcium,enhance the activities of soil urease,su-crase,catalase,increase the potassium and calcium contents in stems and leaves,and promote the accumulation of total sugar,soluble sugar and anthocyanin in bayberry fruit,and increase the proportion of commercial fruit and high quality fruit.In general,potassium humate could be used as a suitable soil conditioner for bayberry,to promote the fruit quality by improving the soil environment.
Chinese bayberrypotassium humatesoil improvementtree nutritionfruit quality
NETL
NSTL
万方数据
