Study on High-yield Characteristics of Multi-cropping Transplanted Spring Maize with Plastic Film Mulching along the Bank of the Changjiang River Region
Suyu 9 maize variety was selected to analysis the yield characteristics of transplanted spring maize with plastic film mulching.The results showed that the yield of transplanted spring maize with plastic film mulching were markedly increased than that of outdoor transplantation and direct sowing with plastic film;Density experimental results showed that the highest yield was 8 118 15 kg/hm 2 under 8 8411×10 4 plants/hm 2.When density increased by 10 000 plants/hm 2,the silk number per plant decreased by 9 14 pieces and grain number per ear decreased by 19 22 kernel, the silk number per 1 hm 2 increased 4 82×10 6 pieces and grain number per 1 hm 2 increased by 2 17×10 6 kernel;Optimum plant densities was 8 0180×10 4～9 6642×10 4 plants/hm 2,LAI was 4 48～5 05 at silking stage and 2 52～2 55 at maturing,potential sink capacity was 44 62×10 6～52 55×10 6 pieces/hm 2 and the actual sink capacity was 30 30×10 6～33 87×10 6 kernel/hm 2.