土壤施N、NP、NPK肥对越桔生长、产量及叶片元素含量的影响

Effect of Soil-applying N, NP and NPK Fertilizer on The Growth, Yield and Leaf Element Content of Blueberry

摘要:

对暗棕色森林立上栽培的6年生“美登”矮丛越桔，连续2年土壤施人N、NP和NPK复合肥，研究结果表明：土壤施入纯N肥，促进了树体生长，但百果重和产量降低，果实成熟延迟，且有贪青和越冬抽条加重现象;土壤施入NP和NPK复合肥，既可以促进树体生长，又增加了百果重和产量，尤以NPK复合肥效果明显。经叶分析表明，施入N、NP和NPK肥均提高了叶片中N、K、Mn含量而降低了Ca、Mg含量;增施N肥降低了叶片P含量，增施NP肥增加了叶片P含量。根据2年的研究结果认为，在暗棕色森林土壤上栽培越桔时单施N肥对生长不利，增施肥料以NP肥和NPK复合肥为宜，较适宜的施肥量为500~1000kg/hm²。

Abstract:

Six years old“Blomidon”lowbush blueberry cultured on dark brown forest soil was selected and N(NH₄NO₃), NP((NH₄)₂PO₄) and NPK compound fertilizer were applied in soil in twoyears.The result indicated that soil-applying N fertilizer increased the growth but decreased yield ofblueberry.Soil-applying NP and NPK compound fertilizer not only increased the growth but also increased the yield of blueberry. Leaf analysis showed that leaf N, K and Mn content were increased butleaf Ca and Mg content were decreased by all fertilizer treatment. Soil-applying N fertilizer decreasedleaf P but soil-applying NP and NPK fertilizer increased leaf P. According to the result, N fertilizer isnot benefit to blueberry culture, and NP and NPK fertilizer are benefit to blueberry culture. The suitableapplying amount of NP and NPK compound fertilizer is 500 to 1000 kg/hm².