Variation in net primary productivity and biomass of forests in the high mountains of Central Himalaya

1995 ◽  
Vol 6 (1) ◽  
pp. 23-28 ◽  
Author(s):  
S.C. Garkoti ◽  
S.P. Singh
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity ◽  
Central Himalaya ◽  
High Mountains

Aspects of productivity and nutrient cycling in an 8-year-old Eucalyptus plantation in a moist plain area adjacent to central Himalaya, India

1991 ◽  
Vol 21 (9) ◽  
pp. 1365-1372 ◽  
Author(s):  
Surendra S. Bargali ◽  
Surendra P. Singh
Keyword(s):  
Nutrient Cycling ◽  
Nutrient Uptake ◽  
Primary Productivity ◽  
Net Primary Productivity ◽  
Biomass Productivity ◽  
Central Himalaya ◽  
Natural Forests ◽  
Eucalyptus Plantation ◽  
Plain Area ◽  
Sal Forest

In the present study we describe biomass, productivity, and nutrient cycling in an 8-year-old Eucalyptustereticornis Sm. (Eucalyptus hybrid) plantation and compare them with those of a Populusdeltoides Bartr. plantation of the same age and area, a natural sal (Shorearobusta Gaertn. F.) forest, and other natural forests of the central Himalaya. The total vegetation biomass of the Eucalyptus plantation (126.7 t•ha−1) was lower than that of the P. deltoides plantation (176 t•ha−1) and natural forests (163.4–786.7 t•ha−1). The net primary productivity of the Eucalyptus plantation (23.4 t•ha−1•year−1) was similar to that of the P. deltoides plantation (25 t•ha−1•year−1) and the natural sal forest (22 t•ha−1•year−1). The net nutrient uptake of Eucalyptus was lower than that of Populus plantation and natural forests.

Productivity and nutrient cycling in poplar stands in central Himalaya, India

1994 ◽  
Vol 24 (6) ◽  
pp. 1199-1209 ◽  
Author(s):  
L.S. Lodhiyal ◽  
R.P. Singh ◽  
S.P. Singh
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity ◽  
Nutrient Use Efficiency ◽  
High Density ◽  
Low Density ◽  
Central Himalaya ◽  
Study Region ◽  
Nutrient Use ◽  
Nutrient Retranslocation ◽  
Use Efficiency

Productivity and nutrient-use efficiency were investigated in plantations of similar age of poplar clone D121 (Populusdeltoides Marsh.) that differed mainly in plant density. The plantations were located in the Tarai belt (low-lying area with high water table) of the Indian Central Himalaya. The total net primary productivity of the high-density plantation (4 years old with 666 trees/ha) was conspicuously higher (32.4 tones•ha−1•year−1) than that of the low-density (20 tonnes•ha−1•year−1) plantation (5 years old with 400 trees/ha), while nutrient-use efficiency was similar in these plantations. The net primary productivity/leaf nutrient ratios and percent nutrient retranslocation from senescing leaves were higher in the high-density than in the low-density plantations. In these young plantations leaf litterfall accounted for most of the litterfall (96–97%). The amount of nutrients that returned through litterfall to the soil was distinctly greater in the high-density plantation than in the low-density plantation. The greater nutrient return was due to first, the greater dry weight of litterfall and the lower proportional nutrient retranslocation from leaves during senescence in the high-density plantation. The high-density plantation also showed greater nutrient extraction efficiency from soil. Compared with a Eucalyptustereticornis Sm. plantation, and with natural forests of the study region, the nutrient use efficiency of poplar, regardless of its density, was lower.

Satellite-based estimation of net primary productivity for southern China’s grasslands from 1982 to 2012

2017 ◽  
Vol 71 (3) ◽  
pp. 187-201 ◽  
Author(s):  
W Yang ◽  
T Lu ◽  
S Liu ◽  
J Jian ◽  
F Shi ◽  
...  
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity
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