Estimation of biomass and nutrient storage in a Himalayan moist temperate forest

1983 ◽  
Vol 13 (6) ◽  
pp. 1185-1196 ◽  
Author(s):  
K. S. Negi ◽  
Y. S. Rawat ◽  
J. S. Singh

Aboveground tree biomass, estimated for three relatively protected oak forest sites in the Kumaun Himalaya using allometric equations based on circumference at breast height and density, ranged from 197.2 to 322.8 t•ha−1. Average leaf, twig, branch, and bole biomass proportions were 6.9, 11.6, 29.1, and 52.4%, respectively. Nutrients stored in the aboveground tree biomass on slightly acidic, fairly deep, residual sandy loams averaged (kilograms per hectare): ash, 7962.5; Ca, 4946.6; Mg, 831.9; N, 2270.7.

1981 ◽  
Vol 11 (2) ◽  
pp. 299-305 ◽  
Author(s):  
Eric J. Jokela ◽  
Colleen Ann Shannon ◽  
Edwin H. White

Biomass and nutrient accumulation by tree components for 66-year-old mature paper birch is presented. Logarithmic regression equations are given relating aboveground tree component biomass and contents of N, P, K, Ca, and Mg to tree diameter at breast height (dbh). Branches, bole bark, and bole wood accounted for 90–97% of the total aboveground tree biomass. Highest concentrations of most nutrients were in the foliage. For the tree of mean basal area (dbh = 15 cm), the crown components of branches and foliage constituted only 16% of the biomass but accounted for 49, 57, 53, 37, and 44%, respectively, of the N, P, K, Ca, and Mg accumulated.


2017 ◽  
Vol 63 (4) ◽  
pp. 413-419 ◽  
Author(s):  
Woodam Chung ◽  
Paul Evangelista ◽  
Nathaniel Anderson ◽  
Anthony Vorster ◽  
Hee Han ◽  
...  

1990 ◽  
Vol 20 (10) ◽  
pp. 1583-1592 ◽  
Author(s):  
Caroline M. Preston ◽  
Valin G. Marshall ◽  
Kevin McCullough ◽  
Donald J. Mead

Fertilizer was applied on snow in January 1981 at 100 kg N•ha−1 as [15N]urea, 15NH4NO3, and NH415NO3 to 11-year-old lodgepole pine (Pinuscontorta Dougl. var. latifolia Engelm.) at Spillimacheen in the British Columbia interior and as [15N]urea (200 kg N•ha−1) to 13-year-old Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) at Green Mountain, a coastal site in British Columbia. Recovery of labelled N after one growing season was determined in soil and biomass at both sites, and it was also monitored during the growing season in snow and soil at Spillimacheen. At Green Mountain, 5.5% of urea N was recovered in tree biomass, 10.8% in understory, and 33.4% in soil organic N (total recovery 49.7%). Leaching may have contributed to N losses at Green Mountain, but was probably not a direct consequence of the application on snow. At Spillimacheen, total recovery of [15N]urea was 93.3%, with 10.1% in tree biomass, 2.4% in understory, and 80.8% in soil. For 15NH4NO3, recoveries were 5.3% in tree biomass, 2.9% in understory, and 87.0% in soil, for a total of 95.2%. For NH415NO3, recoveries were 1.9% in tree biomass, 3.4% in understory, and 39.1% in soil, for a total of 44.4%. At Spillimacheen, the performance of 15NH4NO3 was comparable to that of urea in tree uptake and soil retention. There were large losses with the NH415NO3 source, however, most likely due to leaching and denitrification during snowmelt. For this reason, fertilization with nitrate on snow is not recommended because of nitrate's susceptibility to leaching, but urea and ammonium sources may be applied under these conditions.


Sign in / Sign up

Export Citation Format

Share Document