Abstract Background Biogenic volatile organic compounds (BVOCs) play an essential role in tropospheric atmospheric chemical reactions. There are few studies conducted on BVOCs emission of dominant forest species the Jing-Jin-Ji area China. Based field survey, resources data and measured standard factors, Guenther model developed 1993 (G93) was applied this paper to estimate from several ( Platy...

Drought-induced tree mortality has been observed worldwide. Nevertheless, the physiological mechanisms underlying this phenomenon are still being debated. Potted Robinia pseudoacacia and Platycladus orientalis saplings were subjected to drought and their hydraulic failure and carbon starvation responses were studied. They underwent simulated fast drought (FD) and slow drought (SD) until death. ...

Rainfall is one of the core components water cycle in terrestrial ecosystems and closely related to hydrothermal balance, plant animal growth, stability whole ecosystem. Long-duration rainstorms can alter soil structure forest affect spatial distribution moisture, thus affecting supply from trees being factors that increase vulnerability ecosystems. In recent years, changes rainfall patterns ha...

Isolation and identification of some potent anti-tumor compounds from medicinal plants, has motivated researchers to screen different parts of plant species for anti-tumor effects. It has been reported that several conifer posses cytotoxic activities on some human tumor cell lines. In this study, male and female branchlets or fruit of four different species of Iranian conifers (Juniperus Sabina...

Isolation and identification of some potent anti-tumor compounds from medicinal plants, has motivated researchers to screen different parts of plant species for anti-tumor effects. It has been reported that several conifer posses cytotoxic activities on some human tumor cell lines. In this study, male and female branchlets or fruit of four different species of Iranian conifers (Juniperus Sabina...

Long-term afforestation strongly changes the soil’s physicochemical and biological properties. However, underlying mechanism of different tree species driving change in soil nutrients is still unclear long-term dryland plantations Loess Plateau, China. In this study, samples surface (0–20 cm) woody litter were collected from five (?50 years) Caragana korshinskii, Armeniaca sibirica, Populus hop...

To reveal the effects of different land-use types on soil enzyme activities, samples were collected from 0–10, 10–20 and 20–30 cm layers to compare analyze β-glucosidase (BG), urease (URE), protease (PROT) catalase (CAT) activities in farmland (FL), abandoned land (AL) three plantation forests: Platycladus orientalis (L.) Franco (PO), Robinia pseudoacacia L. (RP) Quercus variabilis Bl. (QV) roc...