论文部分内容阅读
玉米是需水量大但又不耐涝的作物。土壤湿度超过最大持水量80%以上时,玉米就发育不良,尤其在玉米苗期表现更为明显。玉米种子萌发后,涝害发生的越早受害越重,淹水时间越长受害越重,淹水越深减产越重。一般淹水4天减产20%以上,淹没3天,植株死亡。玉米出现涝渍害以后应尽快采取补救措施,将损失降至最低程度。排水降渍要疏通田头沟、围沟和腰沟,及时排除田间积水,降低土壤湿度,达到能排、能降的目的。中耕松土降水后地面泛白时要及时中耕松土,破除土壤板结,促进土壤散墒透气,改善根际环境,促进根
Corn is a crop that requires large amounts of water but is not resistant to waterlogging. When the soil moisture exceeds the maximum water holding capacity of more than 80%, maize will be poorly developed, especially in maize seedling stage. After germination of corn seeds, the earlier the flood damage occurs, the heavier the damage is. The longer the flooding time is, the heavier the damage is, and the deeper the flooding is, the less the yield is. Generally 4 days waterlogging cut more than 20%, submerged for 3 days, plant death. After the occurrence of waterlogging corn should take remedial measures as soon as possible to minimize the loss. Drainage to clear the ditch Tietou ditch, ditch and waist ditch, and timely exclude field water, reduce soil moisture, to row, can drop the purpose. Cultivation of loose soil After precipitation when the ground whiten the soil in time to cultivate, break the soil compaction, soil moisture and improve ventilation, improve the rhizosphere environment and promote root