| 饶 昕,吴 鹏,索 默,岳丽兴,傅俊涛,李舒婷,陈 斌,刘金凤.云南省现状草原植被净初级生产力和降水利用效率的
空间分布格局研究[J].林业调查规划,2025,50(6):70-78 |
| 云南省现状草原植被净初级生产力和降水利用效率的
空间分布格局研究 |
| Spatial Patterns of Net Primary Productivity and Precipitation UtilizationEfficiency in Grassland of Yunnan Province |
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| DOI： |
| 中文关键词: 植被降水利用效率(PUE) 植被净初级生产力(NPP) 空间格局 草原类 云南省 |
| 英文关键词: precipitation utilization efficiency (PUE) net primary productivity of vegetation (NPP) spatial pattern grassland type Yunnan Province |
| 基金项目:云南省林业调查规划院昆明分院科技研究项目(KF KJXM 2015-014). |
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| 中文摘要: |
| 以MOD17A3HGF的NPP产品为基础数据,基于变异函数进行气象插值,研究云南省现状草
原植被净初级生产力NPP与植被降水利用率PUE空间分布规律,分析地形和气候因子对其的影
响。结果表明,云南省现状草原NPP均值为976.88 gC/(m2·a),空间分布总体上由南向西北递减,最
高为西双版纳州,最低为迪庆州;PUE分布有较强的空间异质性,均值为1.08 gC/(m2·mm·a),最高
为大理州,最低为迪庆州。8 个天然草原类中热性草丛NPP 均值最高,为1 078.34 gC/(m2·a);山
地草甸PUE 均值最高,为1.11 gC/(m2·mm·a);高寒草甸NPP 和PUE 均值最低,为537.05 gC/
(m2·a)和0.62 gC/(m2·mm·a)。云南现状草原NPP 和PUE同时受气候、地形、人为活动、草原盖
度共同影响,NPP 随海拔上升而降低,随气温和降水增加而增加;PUE随气温和海拔上升呈先上升后下降趋势,NPP和PUE在不同气温、降水和海拔区间均差异显著(P<0.05)。NPP和PUE随坡
度增加呈先上升后下降趋势,具有显著的坡向效应,总体上为从西坡至东南坡逐渐增加,阳坡和阴
坡NPP和PUE均差异显著(P<0.05)。 |
| 英文摘要: |
| Using the NPP product of MOD17A3HGF as base data and employing meteorological interpolation
based on the variation function, this study investigated the spatial patterns of net primary productivity
(NPP) and precipitation utilization efficiency(PUE) in grassland of Yunnan Province, and analyzed
the effects of topographic and climatic factors. The results showed that the mean value of NPP in the current
grassland of Yunnan Province was 976.88 gC/(m2·a), and the spatial distribution decreased from south to northwest, with the highest NPP in Xishuangbanna Prefecture and the lowest NPP in Deqen Prefecture;
the distribution of PUE showed strong spatial heterogeneity, with an average value of 1.08 gC/
(m2·mm·a), being highest in Dali Prefecture and lowest in Deqen Prefecture. Among the eight natural
grassland types, the mean value of NPP in tropical grassland was the highest, which was 1 078.34 gC/
(m2·a); the mean value of PUE in mountain meadow was the highest, which was 1.11 gC/(m2·mm·a);
the mean values of NPP and PUE in alpine meadow were the lowest, which were 537.05 gC/(m2·a)
and 0.62 gC/(m2·mm·a) respectively. Both NPP and PUE of grassland in Yunnan were affected by climate,
terrain, human activities and grassland coverage. NPP decreased with increasing altitude but increased
with temperature and precipitation; PUE showed an initial increase followed by a decrease with rising temperature
and altitude, and NPP and PUE were significantly different in different air temperature, precipitation and
altitude(P<0.05). Both NPP and PUE initially increased and then decreased with increasing slope,
demonstrating significant slope direction effect, generally increasing from western to southeastern slopes,
and significant differences(P<0.05) in NPP and PUE were found between sunny and shady slopes. |
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