卫星搭载二色胡枝子(L esp ed eza bicolor)干种子,返地后对其出苗率、株高、生长速度和生育期等性状进行观察。结果表明,卫星搭载当代,种子出苗率、生长速度和株高显著降低;过氧化物同工酶检测显示谱带发生变化,表明卫星搭载对种子的...卫星搭载二色胡枝子(L esp ed eza bicolor)干种子,返地后对其出苗率、株高、生长速度和生育期等性状进行观察。结果表明,卫星搭载当代,种子出苗率、生长速度和株高显著降低;过氧化物同工酶检测显示谱带发生变化,表明卫星搭载对种子的生理生化活动产生明显的影响。展开更多
The thickness of snow accumulated near different kinds of protection forest, i.e. shelterbelt ( Pinus sylvestris var. mongolica ) with ventilation structure, grouped protection forest ( P. sylvestris var. mongolica ) ...The thickness of snow accumulated near different kinds of protection forest, i.e. shelterbelt ( Pinus sylvestris var. mongolica ) with ventilation structure, grouped protection forest ( P. sylvestris var. mongolica ) with closed structure, and the protection forest ( Lespedeza bicolor ) with loose structure, at Baiyinhua Sand in Fuxin of Liaoning Province were measured. The shape of snow drift on the windward side and leeward side near shelterbelt was long and thin, and distributed evenly. The farther the snow drift away from the shelterbelt, the more even it distributed. The grouped protection forest had the thickest snow accumulated (30.5 cm) on the forest edge on the windward side, but distributed unevenly. The snow accumulated on the edge of leeward side of protection forest with loose structure was 15.8 cm in thickness, and the snow in the forest was thicker than the average. Grouped protection had the greatest influence on the thickness of snow accumulated, followed by the forest with loose structure, and the shelterbelt the least. The effective distance of snow accumulation on lee side was longer (84 m at its maximum) than on windward side (42 m at its maximum). Mathematical equations were established by regression analysis to forecast the thickness of snow at different distances away from the forests.展开更多
文摘The thickness of snow accumulated near different kinds of protection forest, i.e. shelterbelt ( Pinus sylvestris var. mongolica ) with ventilation structure, grouped protection forest ( P. sylvestris var. mongolica ) with closed structure, and the protection forest ( Lespedeza bicolor ) with loose structure, at Baiyinhua Sand in Fuxin of Liaoning Province were measured. The shape of snow drift on the windward side and leeward side near shelterbelt was long and thin, and distributed evenly. The farther the snow drift away from the shelterbelt, the more even it distributed. The grouped protection forest had the thickest snow accumulated (30.5 cm) on the forest edge on the windward side, but distributed unevenly. The snow accumulated on the edge of leeward side of protection forest with loose structure was 15.8 cm in thickness, and the snow in the forest was thicker than the average. Grouped protection had the greatest influence on the thickness of snow accumulated, followed by the forest with loose structure, and the shelterbelt the least. The effective distance of snow accumulation on lee side was longer (84 m at its maximum) than on windward side (42 m at its maximum). Mathematical equations were established by regression analysis to forecast the thickness of snow at different distances away from the forests.
