初级生产量

1981&2000年内蒙古中部地区植被净初级生产量变化研究

Study on Net Primary Production Variations in the Central Part of Inner-Mongolia during 1981-2000

近些年该水库鱼类对生长季节的初级生产量的利用率为O.61%。

The utilization rate of the primary production in growth season by fishes was 0.61 % .

细根年净生产量20～1317g·m-2·a-1，占林分总净初级生产量的3%～84%，大部分在10%～60%；

Annual fine-root net primary production ( NPP ) was 20 ~ 1317 g · m - 2 · a - 1 , amounting to 3 % ~ 84 % of total stand NPP , mostly 10 % ~ 60 % .

西双版纳热带次生林净初级生产量的初步研究

A preliminary study on the net primary production of the secondary tropical forest in Xishuangbanna

连续放牧群落净初级生产量高于禁牧群落，为超补偿生长。

The primary production under CG is higher than the FG and appeared as over-compensatory growth .

对地上部分净初级生产量和植物种子的消费率分别为5.65%和68.14%；

Consumption efficiency on the total aboveground net primary production and plant seeds was 5.56 % and 68.14 % respectively .

1982年初级生产量为23.46吨/公顷，其中年掉落物为8.52吨/公顷，占总量的36.31%。

The primary production of this community in 1982 was 23.46 t · ha-1 . yr-1 . , in which annual litter fall was 8.52 t · ha-1 · yr-1 , that made up 36.32 percent of total annual primary production .

1～8龄生物量增长迅速，8～11龄生物量增长相对较缓，11龄后通过自然稀疏沙棘能维持较合理的群落结构和较高初级生产量。

The biomass 1 ~ 8 years old Hippophae rhamnoides increased rapidly , but that of 8 ~ 11 years old increased more slowly . Hippophae rhamnoides older than 11 years could keep reasonable community structure and higher primary productivity by natural thinning .