نتایج جستجو برای: mowing quality
تعداد نتایج: 753712 فیلتر نتایج به سال:
While mowing-induced changes in plant traits and their effects on ecosystem functioning in semi-arid grassland are well studied, the relations between plant size and nutrient strategies are largely unknown. Mowing may drive the shifts of plant nutrient limitation and allocation. Here, we evaluated the changes in nutrient stoichiometry and allocation with variations in sizes of Leymus chinensis,...
Mowing for hay is a widely adopted practice for grasslands utilization and management. However, its effects on energy partitioning have not well been studied. Our primary objective was to examine the role of mowing as a disturbance factor acting on energy partitioning and relationships between community composition/structure and energy fluxes in a typical steppe ecosystem through a long-term fi...
Biological control of Canada thistle using Puccinia punctiformis has been largely unsuccessful in part due to a low incidence of systemically infected shoots and heterogeneous distribution of teliospores in the soil. The present study investigated the feasibility of strategic mowing to improve incidence of systemically infected shoots, and enhance intraand/or inter-season disease development in...
Abstract Forage yield is the fundamental ecosystem service of grasslands. While quantitative responses forage to nitrogen (N) enrichment are well known, its qualitative remain unclear. Even less known relative contribution changes in community composition quality at level. We examined and both plant functional group levels with factorial treatments N addition mowing a temperate steppe. Nitrogen...
—In tallgrass prairie, cicadas emerge annually, are abundant and their emergence can be an important flux of energy and nutrients. However, factors influencing die distribution and abundance of these cicadas are virtually unknown. We examined cicada emergence in plots from a long-term (13 y) experimental manipulation involving common tallgrass prairie management practices. The plots were arrang...
Lawn mower-related injuries to children are relatively common and can result in severe injury or death. Many amputations during childhood are caused by power mowers. Pediatricians have an important role as advocates and educators to promote the prevention of these injuries.
An approach is present which integrates an economic and an ecological model for designing cost-effective compensation payments for conservation of endangered species in real landscapes. The approach is used to develop a cost-effective compensation payment scheme for conservation of an endangered butterfly species (Maculinea teleius) protected by the EU Habitats Directive in the region of Landau...
John C. Inguagiato, Ph.D. James A. Murphy, Ph.D. Bruce B. Clarke, Ph.D. Anthracnose, caused by the fungus Colletotrichum cereale (2), has become a common disease of annual bluegrass (Poa annua) and, to a lesser extent, creeping bentgrass (Agrostis stolonifera) greens throughout the world (9). The disease may occur as a basal rot of necrotic, watersoaked crown tissue at any time of the year or a...
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