Gross Primary Productivity(GPP) ( GPP ) is not only one of the major determinants of carbon exchange between the atmosphere and terrestrial ecosystems, but also an crucial gauge to describe plant activities and functions. 总初级生产力(GrossPrimaryProductivity,GPP)不仅是大气和陆地生态系统碳交换的主要决定因素之一,也是表征植物活动和功能的重要指标。
As one of the key components in the global carbon cycle, released CO2 from soil is one of the major pathways to exchange CO2 between soil and atmosphere, which is second only to gross primary productivity. 土壤CO2释放作为土壤-大气CO2交换的主要途径之一,也就成为各国生态学家研究的重点内容。
The ratio of gross primary productivity to community respiration was the highest in the first stream orders, which means autochthonous productivity was dominant in the river. 在全水系范围内河流初级生产力(P)与群落呼吸(R)比值P/R均大于1,说明香溪河是一条以自养生产为主的河流。