苏北地区稻麦秸秆持续全量还田下机插秧苗促早发技术

针对稻麦秸秆持续全量还田时土壤中秸秆总量和腐解强度显著提高,机插稻返青活棵时间普遍延长,甚至僵苗死苗严重、穗数难足、穗型较小等共性技术难题,淮安市农业技术推广中心提出了苏北地区稻麦秸秆持续全量还田下机插秧苗大田促早发技术,主要措施包括:培育适龄机插壮秧;控减底施化肥;适度减小耕整深度;足丛小株浅栽;无水层活棵、化除、施肥;早施分蘖肥,重施穗肥;全程湿润灌溉。

The Technology on Earlier Surviving and Tillering of Machine Transplanting Rice under Rice and Wheat Straw Continued Returning in the Northern Area of Jiangsu Province

Under the condition of total rice and wheat straw continued returning in the northern area of Jiangsu Province, the total amount of straw and its decomposing intensity in the soil were significant increased, the re-green time of machine transplanting seedling generally prolonged, even appeared severe stop growing and dead seedlings, the panicle number were hard to get enough and the spike was small, and so on. Agricultural Technology Prometion Center of Huaian City put forward a new technical scheme to solve these problems, its in-cluding:cultivation suitable age and strong seedlings;reducing basic chemical fertilizer;moderate reducing tillage depth;planting enough seedlings and shallowly; re-green, chemical weeding and fertilizer in moist soil;earlier application of tillering fertilizer;reducing early ni-trogen fertilizer and increasing panicle nitrogen fertilizer;full moist irrigation in the whole growth period.