Abstract:
Objective To provide a scientific basis for high-yield cultivation of spring maize, Zea mays L., in southern hilly red soil.
Method Film mulching cultivation was coupled with organic fertilizer and increasing K fertilizer, using conventional fertilization and open cultivation as the control.Yield, physiological and biochemical characteristics of spring maize were researched in different cultivation models.
Result Conventional fertilization+organic fertilizer+K fertilizer+ film mulching cultivation(TOK) resulted in the highest yield, increasing 3.4% compared with conventional fertilization+bare land (CK).One hundred-seed weight of TOK increased 14.9%, 15.1% and 20.4% respectively, compared with conventional fertilization+organic fertilizer+film mulching cultivation(TO), conventional fertilization+K fertilizer+ bare land(TK) and CK.Each drought index showed TOK>TO>TK>CK.The net photosynthetic rate(Pn) in each growth stage showed TOK>TO>TK>CK.There was a maxmum change range of Pn among all treatments in maturity, which was 43.62%.
Conclusion TOK is one of the better cultivation models for spring maize in hilly red soil upland of southern China, which can achieve high yield by increasing Pn and drought resistance.