Effect of biomass removing by thinning on production preconditions in Scots pine stands

Tharandt

2006

S. 199-202

2 Abb., 9 Lit. Ang.

Artikel aus einem BuchUnselbständiges Werk

200133489

Thinning reduces the number of trees participated in nutrient retum by litter-fall. This problem can be very important on the naturally nutrient-poor sites, where commercial forests with pine stands are cultivated. The presented paper analyses the effect of thinning on amount of nutrients returned by litter-fall in differently thinned young Scots pine (Pinus sylvestris L.) stands as the principal condition of their production. The results showed that the total weight of litter-fall in observed young pine stand at the age of 8 - 19 years varied from 1,300 to 5,400 kg.ha-1. During the l2-year period of observation, 44.2 thousand kg.ha-1 of dry biomass fall down on control variant, whereas periodic litter-fall on thinned variant represented 36.4 thousand kg.ha-1. Therefore, during the period of Observation, lower amount of nutrients (per 1 ha about 63 kg of N, 9 kg of P, 9 kg of K, 34kg of Ca and 2kg Mg) was stored under thinned stand compared to unthinned control stand.