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设置漫灌常规施肥(CK)、微喷灌常规施肥(MC)以及微喷灌减肥20%(MR)3个处理,研究3种不同水肥处理对华北地区夏玉米营养生长和生殖生长以及最终产量的影响。结果表明,常规施肥量情况下,微喷灌能够促进玉米灌浆期生物量的积累,MC处理比CK处理显著提高9.58%,成熟期没有显著性差异;微喷灌减肥20%没有造成生物量积累的减少。常规施肥量情况下,微喷灌能够显著促进玉米子粒的灌浆速率,达最大灌浆速率时的天数比CK处理高1 d,灌浆速率最大时的生长量Wmax比CK高9.99%,灌浆活跃期比CK高7.20%;微喷灌减肥20%处理,与CK处理相比达最大灌浆速率时的天数比CK处理高1.60 d,灌浆速率最大时的生长量Wmax比CK高10.59%,灌浆活跃期比CK高14.83%,最大灌浆速率低于CK处理。MC处理玉米产量最高,分别比CK处理与MR处理提高6.70%与5.68%(P<0.05);MR处理与CK处理没有显著性差异。
The effects of three different water and fertilizer treatments on the vegetative, reproductive growth and final yield of summer maize in North China were studied. The effects of conventional fertilization (CK), conventional fertilization (MC) by micro-sprinkler irrigation and 20% (MR) The results showed that micro-sprinkling irrigation promoted the accumulation of corn biomass during grain filling stage. The MC treatment increased significantly by 9.58% compared with CK treatment, but no significant difference was observed in mature stage. Micro-sprinkling irrigation did not result in a decrease of biomass accumulation . Under the condition of conventional fertilization, the micro-sprinkling irrigation can significantly promote the filling rate of maize grain, the maximum number of days at the maximum filling rate was 1 d higher than CK, the maximum Wmax was 9.99% at the maximum filling rate, The results showed that compared with CK treatment, the maximum grain filling rate was 1.60 days higher than that of CK treatment and Wmax was 10.59% higher than CK at the maximum filling rate. The active period of grain filling was higher than that of CK 14.83%, the maximum filling rate is lower than CK treatment. The yield of MC was the highest, which was 6.70% and 5.68% higher than that of CK and MR respectively (P <0.05). There was no significant difference between CK and CK.