追施海藻叶面肥对盐碱地冬小麦生长及其产量的影响

Effects of Topdressing Seaweeds Foliar Fertilizer on Growth and Yield of Winter Wheat in Saline-alkali Land

[目的]探究追施海藻叶面肥对冬小麦生长和产量的影响。[方法]以喷清水为对照(CK),分别在小麦拔节期、抽穗期和灌浆期以2.5、5.0、7.5 g/L浓度的叶面肥对冬小麦进行追肥,并对冬小麦生长情况和生产能力进行观测比较。[结果]喷施海藻叶面肥处理能增加冬小麦群体数、株高、叶面积、叶绿素含量和养分运输能力、抗倒伏、抗盐碱及其后续生长能力,其中喷施5.0和7.5 g/L叶面肥处理的效果达到了极显著水平;在生产能力方面,喷施海藻叶面肥处理能增加冬小麦生物产量和籽粒产量,喷施5.0和7.5 g/L叶面肥处理的效果极其显著。[结论]中高量喷施海藻叶面肥的效果较好。

[Objective] To investigate the effects of topdressing seaweeds foliar fertilizer on growth and yield increase of winter wheat.[ Method] With spraying clean water as the control, toppdressing of 2.5, 5.0 and 7.5 g/L foliar fertilizer were carried outat wheat jointing stage, heading stage and filling stage, respectively.The wheat growth and yield were observed and compared.[ Result] Spraying the seaweeds foliar fertilizer fertile could increase remarkably the number of winter wheat group, plant height, leaf area, chlorophyll content, nutrient transport capacity, lodging resistance, salt resistance and its subsequent growth ability.Among them, effects of sparying 5.0 and 7.5 g/L foliar fertilizer reached ex-tremely significant level.At the same time, spraying seaweeds foliar fertilizer could increase the biomass yield and grain yield of winter wheat in terms of productive capacity, and treatment effects of 5.0 and 7.5 g/L were extremely effective.[Conclusion] Spraying seaweed foliar fertilizers of medium and high dosage have the best effect.