季节性干旱区不同播期对春玉米生长及产量的影响

Effect of Seeding Time on Growth and Yield of Spring Maize in Seasonal Arid Region

通过春玉米不同播种期试验,探讨了季节性干旱区不同播期对春玉米植株形态、叶绿素含量及产量的影响,分析了春玉米不同播期与避旱减灾和种子发芽出苗的关系。结果表明,随着播种期的推迟,春玉米成熟期推迟,易遇季节性干旱危害,产量降低;在选择早熟品种、适当提早播种、加强培育管理的前提下,能避开季节性干旱,有利于春玉米高产稳产,其适宜播种期为3月中旬至4月上旬。

The growth ,yield and chlorophyll content of spring maize in seasonal arid region with different seeding time treatments were studied. The results showed that maturation period of spring maize was deferred when seeding time was delayed,and yield was reduced for encountering seasonal drought ; seeding time was beneficial to spring maize harvest and avoiding seasonal drought in autumn under appropriate planting technologies such as selecting early maturing variety, early sowing and strengthening the training of management. The appropriate seeding time of spring maize was fi-om the middle ten days of March to the first ten days of April in Hunan.