冬春大棚辣椒新品种品比试验总结

冬春季种植大棚辣椒是禄丰县低海拔地区探索出的脱贫致富的一条新路子,具有广阔的市场前景,禄丰县自从1998年在低海拔试验成功以来,农户一直选用川椒系列的大果B特早、丰优B特早,由于连年种植,品种退化,其早熟性和产量不如从前,因此今年引进五个新品种在川街大棚进行试验,通过试验,筛选出适宜本地种植的品种,供生产上推广应用,现将试验结果总结如下:     

大豆花叶病毒病病种子的氨基酸含量测定

大豆花叶病毒(Soybean Mosaic Virus)不仅影响大豆产量,而且可使大豆种皮产生褐斑,影响外观品质,但是否会导致氨基酸含量的下降,目前仍不清楚.以往,国内外一些学者常利用氨基酸这一性状来选育大豆优质品种,认为大豆种子氨基酸含量,特别是含硫氨基酸量的多少与优质有关。然而,他们对所收获的感染 SMV 的褐斑种子,其氨基酸量的多少以及与无病斑种子之间的比较等都未曾有过研究。为明确 SMV 所引起的褐斑大豆种     

马尾松硫酸盐浆两段氧脱木质素最佳工艺条件的研究

研究了马尾松硫酸浆两段氧脱木质素的最佳工艺条件。结果表明，第一段氧脱木质素的条件为：氧压0．6MPa，温度100℃，时间80min,NaOH 量5％，MgSO4用量0．5％，浆浓10％；第二段氧脱木质素的条件为：氧压0．4MPa，温度90℃，时间60min，NaOH用量3％，MgSO4用量0．5％，浆浓10％。在此条件下，OIOⅡ木质素脱除率达到72．5％，粘度775．2cm^3/g,得率90．5％。经过氧脱木质素后浆的裂断长5．8km，耐破指数5．3kPa.m^2/g，撕裂指数12．7mN.m^2/g。     

Influence of Ammoniacal Copper Quaternary treatments on mechanical properties of blue-stained Lodgepole Pine wood

Three concentrations （2.8%, 2.0%, 1.2%） of Ammoniacal Copper Quaternary （ACQ） was selected to treat Lodgepole pine wood for evaluating ACQ treatment on mechanical properties of blue-stained wood. The bending modules of elasticity （MOE）, modules of rupture （MOR）, toughness and shearing strength parallel to grain on tangential surface, are tested according to the criteria GB1927-1943-91. Non-treated sample were also tested according to the same procedure. The results showed that the three groups specimen impregnated by different concentrations of ACQ solution met the AWPA standard 2003 of America （UC4A 6.4g/cm^3）. There were significant difference of toughness between treated wood and non-treated wood （p=0.01）, but there were no statistically significant differences among three concentrations in terms of toughness, and toughness of treated wood was approximately 20% lower than non-treated. MOR, MOE as well as sheafing strength parallel to grain were found to be not significantly different between treated wood and non-treated one, and there were no statistically significant difference among three concentrations of ACQ too. Toughness, MOR, MOE and sheafing strength parallel to grain increased with decrease of concentration of ACQ, but they were hardly affected by ACQ preservatives.     

杨树新无性系苗期试验

从中国林科院林业所引入２７个杨树新无性系，苗期试验结果表明有９个无性系生长量显著超过Ⅰ－６９杨。其适应性、抗病虫害等特性也优于Ⅰ－６９。     

火炬松纸浆材林土壤管理模式研究

通过对整地、施肥、抚育等研究 ,分析了林分的生长效应、效益 ,分别提出了在中、高立地条件下的火炬松纸浆材林的土壤管理模式。     

科尔沁沙地生态经济型防护林体系综合效益评价的研究

论述了科尔沁沙地生态经济型防护林体系综合效益评价的原则及其评价方法。并通过运用ＡＨＰ层次评价法，对６种不同模式的生态效益、经济效益和社会效益三方面进行了综合效益评价。     

马尾松林间伐前后养分动态的研究

根据定位观测数据，对马尾松人工中龄林间伐前后的养分变化状况进行了分析研究．结果表明，通过间伐，林木各器官的养分含量均发生了明显的变化．林分养分的积累量，随着林分生物量的变化而变化．间伐以前，主要营养元素在树冠生物量中积压最多．间伐以后，主要营养元素在树干生物量中积累最多。说明间伐可以增加树干的干物质积累，对提高林木产量具有重要意义．