thwart
发表于 2025-3-28 18:36:25
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戏法
发表于 2025-3-28 22:17:01
Response of Loblolly Pine to Moisture and Nutrient Stress to the natural distribution of loblolly, many plantations have been established outside of its native range. For example, plantations of loblolly pine have been successfully established and maintained in Illinois, 240 km north of the natural range of loblolly pine (Gilmore et al., 1966); and in Okl
仪式
发表于 2025-3-29 00:21:47
An Overview of Responses of Southern Pines to Airborne Chemical Stressesamage forests. At first, it appeared that the effects of these pollutants diminished rapidly with increasing distance from their sources. However, as knowledge of plant communities increased, so did the realization that the effects of some pollutants were more widespread than was obvious. Over time,
Guaff豪情痛饮
发表于 2025-3-29 06:55:31
Biotic Agents of Stress in the Southseases are by far the most widespread and most studied but, perhaps, the least understood. Their influence on forest productivity may be relatively small, as during low-level infestations that produce nagging drains on growth, or catastrophic, as during epidemic outbreaks that may destroy thousands
propose
发表于 2025-3-29 08:38:23
Interactive Effects of Air Pollutants with Abiotic and Biotic Factors on Southern Pine Forestsractions over a tree’s lifetime. We know from experimental data that individual factors tend to impact trees either negatively or positively: Only factors that show a response tend to be published. Interactions among factors and their impact on trees can be antagonistic, neutral, additive, or synerg
胖人手艺好
发表于 2025-3-29 13:54:42
Atmospheric Deposition and Soil Resources of the Southern Pine Forestnd chemical properties in many soils on all continents. Andisols, one of 11 soil orders of the world, owe their existence mainly to atmospheric depositions of volcanically ejected particulates (Soil Survey Staff, 1992). Near marine coastlines, sea-spray aerosols entrained in the atmosphere are depos
intellect
发表于 2025-3-29 16:24:40
Atmospheric Nitrogen Deposition and the Mycorrhizae of Southern Commercial Forest Treesly, if ever, reach levels that cause visible injury to plants (Garner, 1994). Soil borne mycorrhizal fungi, because of their essential role in the growth and development of forest trees, must be considered when studying factors that influence the overall health of forest ecosystems. To understand fo
无政府主义者
发表于 2025-3-29 21:17:30
Growth Response of Southern Pines to Acidic Precipitation and Ozoneal pine stands in some portions of the region in the mid-1980s (Sheffield and Cost, 1987; Zahner et al., 1989). These observations, along with reports of damage in high-elevation forests of eastern North America (Johnson and Siccama, 1983), southern California (Miller, 1983), and Europe (Blank, 1985
制定法律
发表于 2025-3-30 03:13:10
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假装是我
发表于 2025-3-30 04:15:23
Synthesis and Conclusions from Studies of Southern Commercial Pinesforests were emerging. Beginning in the late 1970’s in Europe there had been reports of unhealthy forests, and by the early 1980s, 20 to 25% of these forests were classified as moderately or severely damaged from unknown causes (Schulze, 1989). Perhaps no European forests were so severely impacted a