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模拟放牧和自然放牧条件下线叶嵩草地下植物量的比较

作  者:
王军强;牛俊义;刘建华;轩春香;张红萍;伏凯红
单  位:
甘肃农业大学农学院
关键词:
模拟放牧;自然放牧;无性系构件;植物量;处理
摘  要:
采用刈割方法通过控制线叶嵩草地上植物量的变化来模拟对地下植物量的影响,并和同期不同自然放牧程度下地下植物量做对比。研究结果表明:(1)无论是在自然放牧条件下还是在模拟放牧条件下,线叶嵩草地下植物量与其深度达到了极显著负相关(P<0.01),处理R10和R7可以模拟轻度放牧(LG)条件下线叶嵩草地下植物量的垂直分布趋势,处理R1可以模拟中度放牧下(阳坡地)(MGs)条件下线叶嵩草地下植物量的垂直分布趋势。(2)处理间R10地下植物量和MGs、LG地下植物量之间构成了显著性差异(P<0.05),R7地下植物量和MGs之间构成了显著性差异(P<0.05),对于极端的放牧形式(HG和CK),不能用短期的刈割来模拟线叶嵩草地下植物量的变化。
译  名:
Comparison on underground phytomass of Kobresia capillifolia under simulated grazing and nature grazing
作  者:
WANG Jun-qiang,NIU Jun-yi,LIU Jian-hua,XUAN Chun-xiang,ZHANG Hong-ping,FU Kai-hong(Gansu Agriculture University Agronomy institute,Lanzhou,730070)
关键词:
kobresia capillifolia;Simulated grazing;Nature grazing;Phytomass
摘  要:
Underground phytomass of kobresia capillifolia under simulated grazing and nature were compared.The results showed that there was a significantly negative linear between underground phytomass of kobresia capillifolia and depth(P<0.01) no matter under nature grazing and simulated grazing.The perpendicularity trend of phytomass of Kobresia capillifolia under low-grade grazing can be simulated with treatment R10 and treatment R7 while under middle-grade grazing can be simulated with treatment R1.Among treatment,there is a notable difference with phytomass between treatment R10 and MGs,LG.The phytomass between R7 and MGs show significant difference(P<0.05).For heavy grazing(HG and CK),short-term simulated grazing can not be used for simulating the change of underground phytomass of kobresia capillifolia.

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