生长季平茬对柠条可食部分生物量及营养价值的影响  

Effect of Stumping in the Growing Season on Biomass and Nutritive Values of Edible Part of Caragana Korshinskii

作　　者：李浩霞[1] 温学飞[1] 王东清[1] Li Haoxia;Wen Xuefei;Wang Dongqing(Desertification Control Institute,Ningxia Academy of Agriculture and Forestry Sciences,Yinchuan,Ningxia 750002)

机构地区：[1]宁夏农林科学院荒漠化治理研究所,宁夏银川750002

出　　处：《宁夏农林科技》2020年第8期9-14,共6页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：宁夏自然科学基金项目“平茬措施下柠条的光合生理生态学补偿机制”(2018AAC03188);世界银行贷款宁夏黄河东岸防沙治沙项目“柠条林的经营和可持续利用研究”(P121289)。

摘　　要：为了研究柠条生长季平茬不同月份可食部分生物量及营养价值的变化规律,针对柠条不同月份植株生物量、可食部分鲜重、不可食部分鲜重及其常规营养物质进行观测和综合分析。结果表明:3-7月可食部分和不可食部分生物量均上升,8-10月又下降。以DMI排序来看,3-6月的高于7-10月的。通过沙地、梁地可食部分柠条营养成分来看,CP、NDF动态变化趋势一致,CP含量分别为16.36%、15.37%,NDF含量分别为60.68%、60.60%。7月份以后CF、NDF、ADF、ADL含量较3-6月的含量高。柠条生长季平茬,3月萌动期、9月初霜期平茬对柠条营养物质影响较大,结合第2年返青后的生长情况,建议柠条平茬时间以5-8月最佳,以提高其品质和可食牧草产量,达到更新复壮、永续利用的目的。In order to study the change law of biomass and nutritive values of the edible part of Caragana Korshinskii in the growing season,the biomass of plants in different month,edible part,fresh weight of inedible parts and the common nutrient substance were observed and analyzed.The results indicated that the biomass of the edible and inedible parts increased between March and July,and decreased between August and October.The DMI between March and June was higher than that between July and October.In view of nutritional ingredients of the edible parts of Caragana Korshinskii in sands,the dynamic change trends of CP and NDF were the same,and the contents of CP were 16.36%and 15.37%,respectively.The contents of NDF were 60.68%and 60.60%,respectively.After July,the contents of CF,NDF,ADF and ADL were higher than those between March and June.Stumping had relatively large influence on nutrient substance of Caragana Korshinskii in germination period of March and frost period of September.According to the growth situation during the period of turning green in the second year,the stumping of Caragana Korshinskii is proper between May and October in order to enhance quality and edible pasture output and realize the goals of sustainable use.

关 键 词：柠条 平茬 可食部分 不可食部分 生物量 

分 类 号：S793.3[农业科学—林木遗传育种]