Effects of crop residues incorporation and N-fertilizer utilization on the matter production of summer maize

The effects of crop residues incorporation and N-fertilizer on the dry matter of summer maize were studied.The results show that crop residues in corporation and N-fertilizer utilization can promote the matter production of summer maize,delay the decrepitude of summer maize's leaves in some degree,prolong the function period of leaves and increase the transportation ability of dry matter from stem to grain.