The Denglou Cape, southwest of the Leizhou Peninsula, is the most typical tropical coast in the continent of China.The coastal geomorphic development basics of the geology and Quaternary environment change are discus...The Denglou Cape, southwest of the Leizhou Peninsula, is the most typical tropical coast in the continent of China.The coastal geomorphic development basics of the geology and Quaternary environment change are discussed. Aerial photograph interpretation with fieldwork is applied to draw the outlines of geomorphic types. Based on the investigative data, the exogenic forces and marine organism conditions concerning tropical coast development in the area are expounded, and coastal dynamo-deposition geomorphic bodies are analysed, mainly with sea cliff-abrasion platform,barrier-lagoon system, modern beach, coral reef and mangrove tidal flat, and the general process of coastal evolution at this area, as well as coastline changes since middle Holocene transgression.展开更多
Background:Drought‐tolerant turfgrass cultivars are becoming more important each year as landscape irrigation practices are becoming more restrictive.Methods:In this study,we quantified the level of drought tolerance...Background:Drought‐tolerant turfgrass cultivars are becoming more important each year as landscape irrigation practices are becoming more restrictive.Methods:In this study,we quantified the level of drought tolerance(DT)in perennial ryegrass and tall fescue genotypes across years under different mowing(MH)and fertility(FL)rates.A total of 48 ryegrass and 38 tall fescue genotypes were planted in 2011 at NexGen,Albany,OR.The trial was divided into three subtrials:(i)DT;(ii)MH and DT;and(iii)FL and DT.Results:The results showed that there was significant genetic variance for most of the traits in both species.The genotype×year interaction was predominantly simple,indicating small changes in genotype ranking for both species.Lower MH improved DT in perennial ryegrass,whereas higher MH resulted in greater DT in tall fescue.For both species,higher MH improved the population mean for turf quality.Higher FL inputs led to higher turf quality for both species,but it did not affect the DT response.Conclusions:Using a selection index,six genotypes for perennial ryegrass and four for tall fescue were selected.展开更多
文摘The Denglou Cape, southwest of the Leizhou Peninsula, is the most typical tropical coast in the continent of China.The coastal geomorphic development basics of the geology and Quaternary environment change are discussed. Aerial photograph interpretation with fieldwork is applied to draw the outlines of geomorphic types. Based on the investigative data, the exogenic forces and marine organism conditions concerning tropical coast development in the area are expounded, and coastal dynamo-deposition geomorphic bodies are analysed, mainly with sea cliff-abrasion platform,barrier-lagoon system, modern beach, coral reef and mangrove tidal flat, and the general process of coastal evolution at this area, as well as coastline changes since middle Holocene transgression.
基金National Institute of Food and Agriculture,Grant/Award Number:Hatch project 1018058。
文摘Background:Drought‐tolerant turfgrass cultivars are becoming more important each year as landscape irrigation practices are becoming more restrictive.Methods:In this study,we quantified the level of drought tolerance(DT)in perennial ryegrass and tall fescue genotypes across years under different mowing(MH)and fertility(FL)rates.A total of 48 ryegrass and 38 tall fescue genotypes were planted in 2011 at NexGen,Albany,OR.The trial was divided into three subtrials:(i)DT;(ii)MH and DT;and(iii)FL and DT.Results:The results showed that there was significant genetic variance for most of the traits in both species.The genotype×year interaction was predominantly simple,indicating small changes in genotype ranking for both species.Lower MH improved DT in perennial ryegrass,whereas higher MH resulted in greater DT in tall fescue.For both species,higher MH improved the population mean for turf quality.Higher FL inputs led to higher turf quality for both species,but it did not affect the DT response.Conclusions:Using a selection index,six genotypes for perennial ryegrass and four for tall fescue were selected.
