摘要
天然割草地补充施用亏损营养元素的研究结果表明:当补充施用制取部分的各种营养元素量时,不但可以与对照群落生物量持平,而且还增加了2.57%.当补充施用割取部分加留茬部分各种营养元素量时,较对照增产4.36%.在割取部分加留茬部分的基础上,增加10%的补充施用量时,较对照增产19.33%.在割取部分的基础上,减少10%的补充施用量时,养分达不到平衡,较对照减产4.37%.另外,禾草生物量得到不同程度恢复.
The results of the research on tile replenishing application of lost nutrient elements in natural mowing grassland showed:When the quantity of various elements taken away in the mowed parts were replenished and applied,the community biomass not only could reach the level of no-mowed site but also increased 2. 57%;when the nutrient elements in the mowed parts and the stubble were replenished and applied,the biomass could increase 4. 36%;on this basis,if 10% beyond the replenishing quantity was applied,the biomass could increase 19. 33% to that of nomowed;on the basis of replenishing elements in the mowed parts, if 10% of the replenishing quantity was reduced,so that the nutrient couldn't reach balance, the biomass would reduce 4. 37 %. Otherwise,the biomass of grasses could recovered in different degree with nutrient replenshing.
出处
《内蒙古大学学报(自然科学版)》
CAS
CSCD
1996年第5期707-712,共6页
Journal of Inner Mongolia University:Natural Science Edition
基金
国家自然科学基金
中国科学院内蒙古草原生态系统定位研究站基金