简介：Background:Ineconomicallyoptimalmanagement,treesthatareremovedinathinningtreatmentshouldbeselectedonthebasisoftheirvalue,relativevalueincrementandtheeffectofremovalonthegrowthofremainingtrees.Largevaluabletreeswithdecreasedvalueincrementshouldberemoved,especiallywhentheyovertopsmallertrees.Methods:Thisstudyoptimizedthetreeselectionruleinthethinningtreatmentsofcontinuouscovermanagementwhentheaimistomaximizetheprofitabilityofforestmanagement.Theweightsofthreecriteria(stemvalue,relativevalueincrementandeffectofremovalonthecompetitionofremainingtrees)wereoptimizedtogetherwiththinningintervals.Resultsandconclusions:Theresultsconfirmedthehypothesisthatoptimalthinninginvolvesremovingpredominantlylargetrees.Increasingstumpagevalue,decreasingrelativevalueincrement,andincreasingcompetitiveinfluenceincreasedthelikelihoodthatremovalisoptimaldecision.However,ifthespatialdistributionoftreesisirregular,itisoptimaltoleavelargetreesinsparseplacesandremovesomewhatsmallertreesfromdenseplaces.However,thebenefitofoptimalthinning,ascomparedtodiameterlimitcuttingisnotusuallylargeinpureone-speciesstands.Onthecontrary,removingthesmallesttreesfromthestandmayleadtosignificant(30-40%)reductionsinthenetpresentvalueofharvestincomes.

简介：Albiziasaman(Jacq)F。Muell。通常作为雨知道树种子与五预先播种被对待学习预先播种的效果的处理在托儿所的萌芽和起始的幼苗开发上的处理。实验在林地和环境科学的研究所的托儿所被建立，Chittagong的大学，Chittagong，孟加拉国。结果揭示了在种子的一个方面抓紧的那根钉子(在theseed的远侧的结束)(T_4)提供(50%)最高播种萌芽。第二最高的萌芽(42%)为为24h(T_1)在冷水里与沉浸对待的种子被获得。当为30s在煮的水里沉浸的种子在为24h浸泡的冷水里列在后面时，萌芽完全被禁止。另外的萌芽参数和起始的词法生长和幼苗的生物资源生产与控制(T_0)相比为处理T_4和T_1也是更高的处理。例如钉子在一个抓紧的T_4的预先播种的处理种子站在一起(在种子的远侧的结束)并且T_1(为24h在冷水里沉浸的种子)可以在托儿所为最大的萌芽和Albiziasaman的起始的精力旺盛的幼苗生长被推荐。

简介：Dalbergia印度黄檀Roxb。是南亚的有希望的多种用途的树种类之一。大多数D的种植园。从种子的印度黄檀由于死回来疾病正在面对严重威胁，它最终在一些月以内引起这个潜在的树种类的死亡。植物的繁殖能避免死回来疾病。D的不同年龄组的三十棵母亲树。印度黄檀为从D评估树枝剪样的rooting行为被选择。由植物生长素影响了的印度黄檀(在100点的IAA或IBA，200，500mg敧敭瑮瀠潲潴潣獬愠敲渠敥敤?潦?潣獮牥慶楴湯漠?桴?灳'虜瑂