Fahrettin Tilki

Effects of Land Management Types on Surface Soil Properties and Aboveground Herbaceous Biomass Production in Semihumid Region in Turkey

The effects of various land-use regimes on the aboveground herbaceous biomass yield and soil properties were studied in the semihumid region in Turkey. Field soil samples under the four land-use types (grassland I, grassland II, grassland III, and apple orchard) were collected from the experimental sites. The aboveground herbaceous biomass yield was determined from a single May harvest each year during three growing seasons. General statistical tools were used to analyze soil and aboveground herbaceous biomass data. The results indicated that saturated hydraulic conductivity, total porosity, and lime content were significantly less In soils under the gramine pasture, legume pasture, and apple orchard compared to the control site. Plant-available water, soil organic matter, total nitrogen, and available phosphorus were significantly less in soils under grassland II compared to the control site. The general linear model (GLM) indicated that aboveground herbaceous biomass yield was affected by the management type and rain.

Doğu kayınında (Fagus orientalis Lipsky) yükseltiye bağlı olarak transpirasyon, yaprak buhar basınç açıklığı ve yaprak su potansiyeli değişimi

This study was designed to determine the effect of altitude on transpiration, leaf vapor pressure deficit and leaf water potential in oriental beech (Fagus orientalis Lipsky). The study area was located in Ortakoy, Artvin, and the experimental area had the same soil structure and aspect. The study showed that transpiration and leaf vapor pressure deficit increased but leaf water potential decreased by altitudinal gradient

BİYOKÜTLE ENERJİSİ VE ENERJİ ORMANCILIGI

Biyokutle dunyada temin edilen enerjinin yakla s ik %14’unu kar s ilamaktadir. Biyokutle uretimi amaciyla enerji ormancili g i cali s malari 1960’li yillarin ortalarindan itibaren ba s lami s ve ozellikle 1970’li yillarda ortaya cikan petrol krizinden sonra hizlanmi s tir. Bu sistemde, kavak, okaliptus ve so g ut gibi hizli buyuyen turler sik dikim araliklari ile tarim uygulamasina benzer yo g un bir i s letim sistemiyle biyokutle uretimi amaciyla kullanilmaktadir. Ulkemizde, baltalik alanlarinda yapilan iyile s tirme cali s malari enerji ormancili g ina yonelik olarak de g erlendirilmekle birlikte, bu alanlar ve kullanilan turlerin modern anlamda uygulanan enerji ormancili g ina uygun olmadi g i gorulmektedir.