分期种植对特种玉米生育及青嫩鲜穗产量的影响

试验研究结果表明,分期种植对特种玉米生长发育及青嫩鲜穗产量的影响,主要体现在晚播种比早播种生育进程加快,青嫩鲜穗产量降低;覆膜种植比同期露天种植生育进程加快,青嫩鲜穗产量增加。试验中6个品种表现一致,分3期播种,每期间隔16d,从播种到乳熟采收全程天数,第2期比第1期缩短3d～5d,第3期比第2期缩短4d～6d;青嫩鲜穗产量第2期比第1期降低1 1%～18 5%、第3期比第2期降低0 2%～22 1%。覆膜种植比同期露天种植生育期提早4d～6d,产量提高1 5%～11 4%。表3,参4。

The effect of different sawing on growth development and fresh yield of earinmaize

The effect of different sawing on growth development and fresh yield of ear in maize was studied. The results showed that the growth development of maize under early sawing condition was faster than late sawing,maize planted under covering plastic condition grew faster than under uncovering plastic condition.In this study,six cultivars were planted in three different date with 16 days span.The period between sawing and maturity in the treatment of second sawing date was 3-5 days less than that in first sawing date with increment of fresh ear yield by 1.1%-18.5% and the period between sawing and maturity in third sawing date was 4-6 days less than that in second date with increment of fresh ear yield by 0.2%-21.1%.The maturity in the treatment of planting with covering plastic was 4-6 days less than uncovering plastic.Yield increased by 1.5%-11.4%.