【作者】 信彩云； 周学标； 刘奇华； 赵庆雷； 王瑜； 马加清；

【Author】 Xin Caiyun;Zhou Xuebiao;Liu Qihua;Zhao Qinglei;Wang Yu;Ma Jiaqing;Shandong Rice Research Institute/Shandong Rice Engineering Technology Research Center;

【机构】 山东省水稻研究所/山东省水稻工程技术研究中心；

【摘要】 为明确不同直播方式对水稻出苗的影响,以圣香粳稻2572为材料,测定其在旱直播条件下不同土层深度(0、1、2、3 cm)和水直播条件下不同水层深度(5、10 cm)的出苗率与幼苗生长情况。结果表明:随着土层和水层深度的增加出苗率呈现下降趋势,H0、H1和H2处理出苗率均在70%以上,H1、H2、H3处理比H0处理的出苗率降低10.9%～3 6.9%;W5和W10处理比H0处理的出苗率降低30.8%、64.8%。播种后18天,株高、地上部鲜重和干重随土层和水层深度的增加而降低,具体表现为H0处理的株高最高,地上部鲜重和干重最大。播种后22、26天,随着旱直播播种深度的增加,水稻株高、地上部鲜重和干重开始表现出增加的趋势;随着水直播水层深度的增加,水稻株高、地上部鲜重和干重表现出降低趋势。综合分析,水直播下的水层深度对水稻出苗率、株高、地上部鲜重和干重的影响较大。旱直播条件下,适宜的播种深度为2～3 cm,水直播条件下播后水层深度不要超过5 cm。更多还原

【Abstract】 Pool experiments were conducted using shengxiangjingdao 2572 to investigate the emergence rates and growth of seedlings by dry direct seeding(0、 1、 2 、 3 cm) and water dired seeding(5、 10 cm).The results indicated that the emergence rates decreased with increasing soil and water depth,the germination rate of H0,H1,H2 treatment were over 70%.Compared to H0 treatment,the germination rate of H1,H2,H3 treatment decreased by 10.9%~ 36.9%,the W5 and W10 treatment decreased by 30.8%~ 64.8%.18 days after sowing,plant height,fresh weight and dry weight decreased with increasing soil and water depth,the biggest HO treatment of the above parameters.22 ~ 26 days after sowing,plant height,fresh weight and dry weight increased with increasing soil depth,the above parameters decreased with increasing water depth.Based on the analysis of the above,water depth in water dired seeding have bigger influence on the rice seedling emergence,plant height,fresh weight and dry weight,Compared with the soil depth in dry dired seeding.Dry dired seeding conditions,suitable sowing depth was 2 ~ 3 cm.Water dired seeding condition,the water depth after sowing was not more than 5 cm.更多还原