polt
1.It is a familiar polt that the master discomfit when his treasure weapon lost in Ming-Qing novels, which embodys the bidirectional mutualism relation between the treasure and his master.
2.Scraper chain is suitable for transmission equipment for loose material such as cement,flour,corn,sand,stone and coal etc,of which the loose material is powdery,grain and polt.
3.Abstract: The biological control effect on fruit tree insects and eco-economic benefit of interplanting Mentha Spicata with orchard was studied and analysed based on field polt experiment.The result shows:interplanting Mentha Spicata with orchard have obviously biological control effect on fruit tree insects like Phyuoenistis eitrella Stainton,Papilio xuthus L,Phyllocoptruta oleivora Ashmead and Myzus perieas Sulzer ect,interphanting Mentha Spicata with slope orchard could reduce soil and water losses,and improve soil physical-chemistry property effectively,its also accelerate fruit tree growth and increase the yield of fruit tree,and has good economic benefit.
