Tree ecophysiology in the context of climate change

Forest structure and function strongly depend on and concurrently influence environmental conditions.Tree performance is generally governed by its genetics and environment;thus,recent hotspots in this field include tree genotype × environment,phenotype × environment,and functional trait × environment interactions.The editorial,review,and 22 original research articles in this Special Issue, "Tree ecophysiology in the context of climate change",highlight ecophysiological phenomena(e.g.,climate hor...     

不同有机物料腐熟剂对农业废弃物堆肥腐熟效率的影响

为提高农业废弃物资源化利用效率,选择6种不同有机物料腐熟剂进行牛粪和棉花秸秆的堆肥试验,监测堆肥温度、pH值、碳氮比、含水量、种子发芽指数等指标.结果表明:添加有机物料腐熟剂后,堆肥沤制初期升温快,堆肥沤制后期腐熟效率高;添加有机物料腐熟剂能缩短堆肥腐熟周期;根据试验结果和使用成本判断6种有机物料腐熟剂性价比,以四川绿微公司生产的有机肥发酵剂和鹤壁人元生物公司生产的促腐剂应用于牛粪和秸秆堆肥发酵效果较好.     

The interplay between leaf water potential and osmotic adjustment on photosynthetic and growth parameters of tropical dry forest trees

Mimosa tenuiflora and Piptadenia stipulacea are commonly accepted as drought-tolerant species but little is known about their response to drought followed by rehydration.Therefore,the interplay between leaf water potential and osmotic adjustment on photo synthetic and growth parameters of these species was examined.A greenhouse study was conducted in a split-plot design with two water conditions in the main plots(control;drought followed by rehydration),and eight sampling times in the subplots(1...     

Ecophysiology and multivariate analysis for production of Tachigali vulgaris in Brazil:Influence of rainfall seasonality and fertilization

Studies on fertilization management of species native to the Amazon for energy plantations contribute to the diversity of species use and reduce biological risk due to the excessive use of clones or hybrids of Eucalyptus.This study evaluates the effect of precipitation seasonality and phosphorus and potassium fertilization on gas exchange in a Tachigali vulgaris plantation.Three levels of P(zero,65.2,130.4 kg ha^-1) and three of K(zero,100.0,200.0 kg ha^-1)were applied in a 3...     

Response of photosynthesis,growth, and acorn mass of pedunculate oak to diff erent levels of nitrogen in wet and dry growing seasons

The objective was to examine the effects of optimal leaf nitrogen levels> 2.0% and suboptimal levels <2.0%,nitrogen nutrition on net photo synthetic rate,stem diameter increment,height growth increment and acorn mass of pedunculate oak during 2010 in the absence of drought stress and during 2011 under the impact of moderate drought stress.According to the results,moderate drought stress significantly reduced net photo synthetic rate,stem diameter increment and height growth increment,while...     

Influence of fire on woody vegetation of savanna and forest formations in the Cerrado biome

Wildfires have environmental,economic,and social impacts,and can shape the landscape and benefit ecosystems such as the Cerrado.This study evaluated the diversity,similarity,and floristic and structural differences of woody savanna and forest formations of the Cerrado,when affected and not affected by fire.Twenty-eight 25-400m2 plots were randomly allocated and divided into Burnt Cerrado and Unburnt Cerrado,Burnt Forest,and Unburnt Forest,and divided into three levels of inclusion according to d...     

无人机棉花脱叶关键技术及应用分析

棉花催熟、脱叶是棉花采收环节中不可或缺的一项主要技术措施,其中,脱叶剂品种选择、喷施时期是否得当及喷施质量决定着脱叶效果和棉花采收质量.无人机因其独特的优势,在阿克苏地区棉花生产上的应用越来越广泛,但也存在一些问题.本文从脱叶剂选择、作业时间的确定、关键技术建议等方面总结阿克苏地区无人机棉花脱叶催熟关键技术,以供棉农参考.     

进出境木质包装风险特征与检疫性有害生物检出通报名录[*]

进出境货物中木质包装传带有害生物得到国际社会普遍关注。分析进出境木质包装检疫监管政策历史变革，收集近10余年我国主要口岸进出境货物中木质包装检疫性有害生物截获报告和研究文献，分析研究其风险特征和规律，比较研究我国木质包装相关的林业检疫性有害生物与进出境木质包装检出的检疫性有害生物名录。结果显示，进境货物中木质包装检疫性有害生物昆虫和线虫检出率高，美国、马来西亚、中国台湾等国家（地区）为高风险地区，IPPC标识不规范，进境未申报或不真实；出境木质包装被进境国家检出天牛侵染，出境前未加施和伪造IPPC标识突出，出境预警量明显低于进境预警量。进境、出境和国内林业检疫性有害生物名录差异较大，初步建立了进境、出境木质包装检疫性有害生物检出通报名录，为科学、有效检疫监管提供参考资料。