摘要
[目的]明确镁肥对红壤饲用大豆产量和品质的影响。[方法]采用盆栽试验,研究原位红壤土不同的镁肥(碳酸镁)添加量对饲用大豆的叶绿素、株高、生物量、ADF和NDF含量、粗蛋白、可溶性糖及K、Mg、Ca含量的影响。[结果]适量镁肥(100 mg/kg)可显著提高大豆植株的生物量、粗蛋白以及镁元素的含量,但对中性和酸性洗涤纤维均无显著影响;低量镁肥(20 mg/kg)的施用对生物量、粗蛋白以及镁元素的作用效率降低,过量镁肥(200 mg/kg)反而会抑制大豆叶片中钙元素的含量。[结论]在红壤上施用适量的镁肥可提高饲用大豆的产量和品质,为农田合理施肥和管理提供科学依据。
[ Objective ] To investigate the effects of different application amounts of Mg fertilizer on the yield and quality of forage soybean in red soil. [ Method] Pot test was carried out to research the effects of different application amounts of Mg fertilizer on the chlorophyll ,plant height,bio- mass,acid detergent fiber （ADF） and neutral detergent fiber （NDF） contents, crude protein, soluble sugar, K, Mg and Ca in forage soybean. [ Result] Appropriate amount of Mg fertilizer （100 mg/kg） significantly enhanced the biomass crude protein content and Mg content of forage soybean ,but had no significant impacts on ADF and NDF cotnents. Low Mg fertilizer （20 mg/kg） had relatively low effects on biomass,crude pro- tein and Mg. Excessive Mg fertilizer （200 mg/kg） restricted the Ca content in forage soybean. [ Conclusion] Application of appropriate amount of Mg fertilizer enhances the yield ＇and quality of forage soybean,which provides scientific basis for the rational application and management of fertil- izer in farmland.
出处
《安徽农业科学》
CAS
2017年第2期13-16,共4页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(NSFC 600030)
关键词
镁肥
饲用大豆
红壤
产量
品质
Mg fertilizer
Forage soybean
Red soil
Yield
Quality
