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微生物肥对羊草植被特征和化学计量学的影响

Effect of bio-fertilizers on vegetation characteristics and stoichiometry of Leymus chinensis

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【作者】 温超单玉梅贾伟星高丽娟杨晓松斯日古楞张军刘永志

【Author】 WEN Chao;SHAN Yumei;JIA Weixing;GAO Lijuan;YANG Xiaosong;Siriguleng;ZHANG Jun;LIU Yongzhi;Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences;Inner Mongolia Research Center for Prataculture,Chinese Academy of Sciences;Tongliao City Animal Husbandry and Veterinary Science Institute;Department of Agriculture and Animal Husbandry of Inner Mongolia;

【通讯作者】 刘永志;

【机构】 内蒙古自治区农牧业科学院中国科学院内蒙古草业研究中心内蒙古通辽市畜牧兽医科学研究所内蒙古自治区农牧业厅

【摘要】 为了解复合微生物肥料在天然草地恢复和改良中的效果,本研究在科尔沁羊草(Leymus chinensis)割草地开展,共设置对照(无添加)、腐植酸、糖蜜发酵、海藻酸和混合微生物肥料(腐植酸+糖蜜发酵+海藻酸)5种处理,研究其对羊草植被特征、品质以及碳(C)、氮(N)、磷(P)生态化学计量特征方面的影响。结果表明,1)与对照相比,复合微生物肥料对羊草地上生物量、高度和密度都有增加作用。糖蜜发酵处理效果最佳,地上生物量和密度均增加了2倍多,高度也显著增加(P<0.05)。2)复合微生物肥料提升了羊草品质。腐植酸处理下中性洗涤纤维和酸性洗涤纤维含量降幅最大,较对照分别降低了20.55%和19.31%。糖蜜发酵处理下羊草粗蛋白含量显著增加(P<0.05),较对照增加了22.01%,中性洗涤纤维和酸性洗涤纤维含量均显著降低(P<0.05)。3)羊草C含量在不同处理间差异不显著(P>0.05)。糖蜜发酵处理下N、P含量显著增加(P<0.05),与对照相比增幅分别为21.97%和13.73%。4)5个处理下羊草的N∶P的变化范围为12.22~13.32,均小于14,可能N是限制当地羊草生长的一个主要因素,P处于相对平衡的状态。综上所述,在未来科尔沁羊草割草地改良中,优先推荐糖蜜发酵复合微生物肥料,同时可适量添加N素,才能使羊草呈现适中的化学计量比。

【Abstract】 In order to explore the effects of compound bio-fertilizers on native pasture restoration and improvement,aLeymus chinensis mowing pasture in Horqin was fertilized with five compound bio-fertilizers,including control,humic acid,molasses fermentation,alginic acid,and mixed compound bio-fertilizers(humic acid+molasses fermentation+ alginic acid).Their effects on vegetation characteristics,quality,and ecological stoichiometry were studied.The results showed that the compound bio-fertilizers increased above-ground biomass,height,and density of the vegetation,and molasses fermentation showed the best results;the community’s above-ground biomass and density were two times higher than the control,and the height increased significantly(P<0.05),with molasses fermentation.The compound bio-fertilizers increased the quality of L.chinensis,and the neutral detergent fiber(NDF)and acid detergent fiber(ADF)of humic acid were the lowest,i.e.,lower than control by 20.55%and 19.31%respectively.While,molasses fermentation increased the crude protein content significantly,i.e.,higher than control by 22.01%,the NDF and ADF decreased it significantly.The carbon(C)content of L.chinensis showed no significant differences among treatments.The nitrogen(N)and phosphorus(P)contents increased significantly and were higher than those in control by 21.97% and 13.73%,respectively,by treatment with molasses fermentation.The variation range of N/P ratio in the five treatments was from 12.22 to 13.32,all less than 14.Therefore,N could be one of the most limiting factors to L.chinensis growing in the area,and P was the relative balance.In conclusion,the molasses fermentation is recommended preferentially,and mixing N fertilizer moderately could show moderate stoichiometric ratio of L.chinensis in the future.

【基金】 农业部公益性行业项目(201303060)
  • 【文献出处】 草业科学 ,Pratacultural Science , 编辑部邮箱 ,2018年09期
  • 【分类号】S543.9
  • 【被引频次】4
  • 【下载频次】206
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