播种深度和播后淹水时间对冬小麦出苗率及冬前幼苗质量的影响

为探讨淹水时间和播种深度对不同小麦品种出苗率及冬前幼苗健壮程度的影响，在控制条件下对四个不同类型品种进行了研究，结果表明：播种后淹水1-4天，可导致五种播深TN18的平均出苗率降低22.43%，越冬期单株干物重降低21.56%；JM20分别降低23.43%和18.46%；SN8355分别降低9.66%和19.86%；LM14分别降低6.21%和23.20；说明淹水对TN18 JM20两品种出苗率的影响显著低于SN8355和LM14。淹水可使3cm地温降低0.470C,5cm降低1.150C。在淹水时间相等条件下，随播种深度的增加，对出苗率和幼苗质量的影响逐渐增大；在播深相同时，淹水时间越长影响越大。在播深2cm～6cm范围内，播种越浅出苗率和越冬期单株干物重越高，淹水对其的影响也越小，浅播是降低渍涝地区渍涝灾害的有效措施；但由于浅播分蘖节基本处在2cm处，不利于抗寒和抗旱，因而该结果仅适于渍涝麦田应用。

Sowing depth and waterlogging time after wheat sowing affect on germination rate and seedling quality before winter

To explore sowing depth and waterlogging time after wheat sowing how to affect germination rate and seedling strong levels before winter,so as to provide the basis of reasonable autumn sowing depth to waterlogging areas;In the pond,using four different varieties to study the response of sowing depth and waterlogging time under controll condition.Results showed that:water logging for 1 to 4 days after sowing can led to the average germination rate of five different sowing depths of TN18 decreased by 22.43%,w...