Measuring effective leaf area index, foliage profile, and stand height in New England forest stands using a full-waveform ground-based lidar

2011 ◽  
Vol 115 (11) ◽  
pp. 2954-2964 ◽  
Author(s):  
Feng Zhao ◽  
Xiaoyuan Yang ◽  
Mitchell A. Schull ◽  
Miguel O. Román-Colón ◽  
Tian Yao ◽  
...  
Keyword(s):  
New England ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Forest Stands ◽  
Area Index ◽  
Full Waveform ◽  
Ground Based Lidar ◽  
Stand Height ◽  
Effective Leaf Area Index

Effects of repeated fertilization on needle longevity, foliar nutrition, effective leaf area index, and growth characteristics of lodgepole pine in interior British Columbia, Canada

2005 ◽  
Vol 35 (2) ◽  
pp. 440-451 ◽  
Author(s):  
Isaac G Amponsah ◽  
Philip G Comeau ◽  
Robert P Brockley ◽  
Victor J Lieffers
Keyword(s):  
British Columbia ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Growth Response ◽  
Lodgepole Pine ◽  
Nitrogen Concentration ◽  
Nutrient Concentrations ◽  
Area Index ◽  
Needle Longevity ◽  
Effective Leaf Area Index

We investigated the effects of repeated fertilization (either periodically every 6 years or annual fertilization) on needle longevity and growth response in two juvenile lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) stands in the interior of British Columbia, Canada. Annual fertilization decreased needle longevity by 23% at the Kenneth Creek site and by 30% at Sheridan Creek, compared with the control treatments at each site. At Sheridan, repeated fertilization significantly increased effective leaf area index, foliated shoot length, and annual shoot growth. However, none of these variables was significantly altered by repeated fertilization at Kenneth. At both locations, fertilization elevated nutrient concentrations in the current year's foliage. Annual fertilization increased nitrogen concentration in mid-crown branches of retained cohorts (1998–2002) at both study sites. Furthermore, annual nitrogen addition apparently induced or exacerbated copper and iron deficiency in these stands, especially at Kenneth Creek, which may be related to the premature loss of foliage. Nutrient imbalance may also be related to poor effective leaf area index and growth response at Kenneth Creek. Stem growth efficiency declined with annual fertilization at Kenneth Creek because of accelerated turnover of needles, increased allocation of growth to branches, and probably reduced photosynthetic capacity.

Decreasing the error in the measurement of the ecosystem effective leaf area index of a Pinus massoniana forest

2018 ◽  
Vol 30 (4) ◽  
pp. 1459-1470
Author(s):  
Zhanghao Chen ◽  
Kunyong Yu ◽  
Jian Liu ◽  
Fan Wang ◽  
Yi Zhong
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Pinus Massoniana ◽  
Area Index ◽  
Effective Leaf Area Index

Retrieving leaf area index in discontinuous forest using ICESat/GLAS full-waveform data based on gap fraction model

2019 ◽  
Vol 148 ◽  
pp. 54-62 ◽  
Author(s):  
Xuebo Yang ◽  
Cheng Wang ◽  
Feifei Pan ◽  
Sheng Nie ◽  
Xiaohuan Xi ◽  
...  
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Area Index ◽  
Waveform Data ◽  
Full Waveform ◽  
Gap Fraction
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