Response of Net Primary Productivity of Larch Plantation to Meteorological Factor

doi:10.13466/j.cnki.lyzygl.2022.03.011

Abstract

Abstract:

Taking larch(Larix principis-rupprechtii) plantation in Daqing Mountain of Inner Mongolia as the research object,net primary productivity (NPP)of larch plantation in the past 41 years was calculated by dendroecological methods and biomass-DBH equations,and the relation between NPP with climatic factors,including precipitation,temperature and humidity was analyzed.The results indicated that the interannual variation of NPP of the plantation showed a trend of increasing at first and then decreasing,and mean NPP of the stand was 3.83t/(hm²·a),with a maximum value of 6.93t/(hm²·a).The NPP was closely correlated with climatic factors.The NPP of larch plantation was significantly correlated with the monthly precipitation in June and November of previous year andthat fromJune to August of currentyear.It was negatively correlated between NPP with the relative humidity in December,February of the previous year and February and December of current year.The NPP was correlative significantly positively with the monthly mean temperature in September of both previous and current year,June of previous year and February and August of current year.The monthly mean temperature and monthly mean maximum temperature in November and December in previous year and Decemberin current year also significantly affected NPP.Generally,precipitation and temperature in growing season,temperature and humidity in winter,that is,the length of growing season determined by temperature,soil moisture in growing season determined by precipitation,and freezing damage determined by temperature and humidity in winter,are main factors of larch forest NPP.It is implied that the larch plantations NPP would present an increasing trend in the future due to the warmer and more humid climate condition in the research region.

Key words: tree ring, net primary productivity, climate factor, Larix principis-rupprechtii

CLC Number:

WANG Yunni, DAI Haiyan, HAI Long, LI Jiatao, SHI Pengfei. Response of Net Primary Productivity of Larch Plantation to Meteorological Factor[J]. FOREST RESOURCES WANAGEMENT, 2022, (3): 67-72.

Figures/Tables 3

References 33

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样地编号	海拔/m	坡度/(°)	密度/(株/hm²)	胸径/cm	树高/m	郁闭度	草本覆盖度/%
P₁	2013	7.0	1366	18.19	13.17	0.70	68
P₂	2011	8.2	1179	19.63	13.89	0.80	65
P₃	2005	7.5	1121	17.99	13.31	0.78	58
P₄	1998	8.3	1056	18.75	14.41	0.75	62
P₅	1989	10.1	1332	18.13	13.78	0.76	70