总初级生产力

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。

Gross Primary Productivity ( 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 .

分级初级生产力的结果表明，在南大西洋和德雷克海峡对总初级生产力的贡献以微微型浮游生物为最大，微型浮游生物和小型浮游生物的贡献大致相当。

The results of size-fractionated productivity showed that the contribution of picoplankton to total productivity was the largest in the Southern Atlantic ocean and Drake Passage , that of nanoplankton and netplankton were approximate .

同时，稻田轮作系统的总初级生产力、光能利用率、辅助能利用率分别比连作系统高17.47%、9.87%和5.0%。

And increased the overall initiative productivity , light energy use rate and auxiliary energy use rate by 17.47 % , 9.87 % and 5.0 % , respectively , N , P and K use rate as well .

生态系统总呼吸Re月平均为95.3±21.1（gCm-2permonth），约占生态系统总初级生产力GPP的67%。

Monthly average ecosystem respiration was 95.3 ± 21.1 ( gCm-2 per month ), which accounting for about 67 % of the gross product of the ecosystem .