THE EFFECTS OF STABLE MANURE AND NP FERTILIZER ON ACCUMULATION DRY MATTER AND YIELD OF POTATO

In this paper,we conduct a research on the processing type potato of DaXiyang,systematically study the effect of the stable manure,NP fertilizer and their interaction on the accumulation of the dry matter and yield of the potato.It is concluded that the application of stable manure or NP fertilizer or both of them all can increase the dry matter accumulation of the whole plant,dry matter accumulation of leaves、 stems and tubers manifested as stable manure + NP fertilizer NP fertilizer stable manureCK.The peak time of dry matter accumulation of leaves,stem and tubers is different,exerts postponed a few days.The application of stable manure,NP fertilizer or both of them can prolong the time when the maximum of daily increase rate come forth.It is a fact that application of manure without any fertilizer or in accord with NP fertilizer can enhance the dry matter,the same as the application of NP fertilizer without any fertilizer or in accord with manure,they all exerts a obvious stimulation effect.The dry matter content of stem and that of leaves after the inflated period of tuber all increased if we make application of fertilizer treatment,which is greater than the application of CK.However,the dry matter content of tubers exerts a opposite direction,that is to say that the function of CK is greater than fertilizer treatment.The application of stable manure and NP fertilizer interaction can evidently increase the output of potato.