扬州古运河风光带生态景观型林地模式的环境效应

Studies in the environment effectof economical landscape forest modelalong the Grand Canal in Yangzhou Thetest showed that Noises in the afforestedregion were decreased by 3-10dBcomparisons with non-afforested region.Leafy, hardness and overlapping rangingtrees are better than others. The shortbranches forest coronet trees such as Sabinachinensis cv.Kaizuka, Ligustrum lucidumAit et.are better apparently effect ondecreasing noises than.highers.Theillumination distribution at differentaltitude was gradually decreasing fromabove forests coronet to forest earth.

多效唑对缓解多年生黑麦草高温胁迫的效应

多效唑处理有效地抑制了多年生黑麦草的植株高度,促进分蘖,提高根冠比,减少高温后的枯黄程度,改善了多年生黑麦草坪用性状;使黑麦草叶片叶绿素、可溶性糖含量显著提高,丙二醛(MDA)的含量降低;多年生黑麦草超氧化物歧化酶(SOD)、过氧化物酶(POD)的活性增强。喷施多效唑能提高多年生黑麦草抗热性,缓解高温胁迫,是黑麦草安全越夏的有效措施。不同浓度多效唑处理的效果有差异,综合效果以600 mg/L多效唑为最佳。