萜烯二硫代羧酸乙酯的合成及其选矿性能

以松节油为起始原料合成了萜烯二硫代羧酸乙酯和萜烯黄原酸乙酯的混合物,并对其在选矿工艺中用作铜捕收剂的性能进了探索性研究     

沼液对地膜小麦根系及产量影响研究

沼液浸种的地膜小麦具有合理的产量结构，比地膜小麦增产9.88%，比露地小麦增产67.65%，苗期着重促进了根系的发育，中后期更快地促进了地上部的生长发育，使植株的抗逆性增强。喷施叶面肥均表现为增产，其中KH₂PO₄效果最好，增产幅度11.94%～13.92%，其余依次为麦丰乐、沼液、红苹果2号，增产幅度不足6%，同时提高了株高、成穗数、穗粒数和粒重。     

大豆种衣剂防治根腐病方法研究初报

在防治大豆根腐病的研究中，通过种子处理防治大豆根腐病的研究，应是一个主要内容，但首先遇到的问题有二；一是有效的药物（或药剂型），二是能使大豆种子上带有足够的药量的方法。本文主要介绍通过农药的筛选、复配、在确定有效药剂配方的前提下，结合防治方法的研究，经过多年室内外试验，示范，研制成功了具有促进大豆生长发育，增另大豆根瘤量，防治大豆根腐病效果达８５％，增产１５％左右的“大豆微复药肥Ｉ号”种衣剂。     

提高旱农地区甘草田间出苗率的试验分析

通过随机区组田间试验的方法，对如何提高甘草田间出苗率进行了研究。试验证明：甘草的田间出苗率与播种深度呈负相关，若底墒好，播后不浇水，播深2．5－3．0cm，可提高其田间出苗率；若底墒差，播后浇水，播深1．5－2．0cm，亦能提高其田间出苗率。在新垦重盐碱地播种甘草，用生长素4号和1号拌种，可分别提高田间出苗率2．9倍和2．6倍。播后3d浇水比播后16d浇水的田间出苗率提高29．5％。     

不同追肥方式和播种密度对桂中地区玉米农艺性状与产量的影响

为探索桂中地区玉米的高产栽培配套技术,2010年在广西来宾市兴宾区开展不同追肥方式和不同播种密度对玉米农艺性状和产量影响的试验。结果表明,2次追肥处理的平均株高、穗位高、产量均比3次追肥处理高;在相同的追肥方式下,在一定播种密度范围内,玉米产量随着播种密度的增加而增加。可见,采用2次追肥的方式,适当增加播种密度,不但能获得高产,而且节省了劳力,是桂中地区玉米较理想的高产栽培技术措施。     

重金属不同污染途径对烤烟生长发育的影响

以烤烟K326为材料,设叶面喷施和土壤浇灌2种方式分别对烤烟施加重金属Pb(20 mg/kg)、Hg(0.5 mg/kg)、Cd(25 mg/kg)、As(20 mg/kg)。采用盆栽试验在大田环境下进行,研究了重金属Pb、Hg、Cd、As在不同污染方式下对烤烟叶长、叶宽、茎围、株高、有效叶片数以及根体积生长发育的影响。结果显示,在Pb、Hg、Cd、As 4种重金属中,Pb和Hg的区别较大,土壤浇灌方式对烤烟生长发育的抑制作用比叶面喷施强;其次是As;Cd通过叶面喷施与土壤浇灌对烤烟生长影响不存在显著性差异。叶面喷施Pb对烟株有效叶片数和株高起着一定的促进作用,对根体积的影响最小。     

蚕蛹壳聚糖复合水凝胶的抗菌性能及对创伤的愈合作用

以蚕蛹壳聚糖、蜂蜜和明胶等为基质制备医用复合水凝胶。对以不同配比制备的蚕蛹壳聚糖复合水凝胶、单纯蚕蛹壳聚糖水凝胶、蜂蜜水凝胶的抗菌性能进行比较试验,并以大耳白兔为受试动物,采用切片法检测蚕蛹壳聚糖复合水凝胶对烫伤伤口的愈合作用。结果表明:用质量分数为0.25%的蚕蛹壳聚糖和质量分数为20%的蜂蜜制成的复合水凝胶的杀菌作用明显高于市售烧伤膏和单纯蚕蛹壳聚糖或蜂蜜水凝胶,对金黄色葡萄球菌、大肠杆菌24 h内的抑菌率均达到100%,且持久性好;大耳白兔烫伤伤口经0.25%蚕蛹壳聚糖+20%蜂蜜复合水凝胶处理后12 d可基本愈合,切片观察愈合的伤口表皮无溃疡,局部毛囊增生,且有新生表皮细胞生成。研究结果显示,蚕蛹壳聚糖复合水凝胶具有广谱抗菌性能,可用作创伤敷料。     

Distribution of biomass and carbon in even‐aged stands of Norway spruce (Picea abies (L.) Karst.): A case study on spacing and thinning effects in northern Denmark

The main objective of this case study was to explore the possible influence of forest management on the levels and distribution of biomass and carbon (C) in even-aged stands of Norway spruce [Picea abies (L.) Karst.] in Denmark. Data originated from a long-term thinning experiment and an adjacent spacing experiment at stand ages of 58 and 41 years, respectively. Biomass of 16 trees from different thinning and spacing treatments was measured or partly estimated, and soils were sampled for determination of C stocks. All trees in each plot were measured for stem diameter and some for total height, to allow for scaling-up results to stand-level estimates. For trees of similar size, foliage biomass tended to be higher in the spacing experiment, which was located on slightly more fertile land. Foliage biomass increased with increasing thinning grade, but the effect could not be separated from that of tree size. At stand level, foliage biomass tended to increase with increasing spacing as well as with increasing thinning grade. For branchwood, stems and roots (including below-ground stump), the biomass increased with increasing tree size and stand volume at tree and stand level, respectively, but no differences between stands, spacings or thinning grades were observed, apart from that expressed by tree size or stand volume. At stand level, C stocks of all biomass compartments decreased with increasing thinning grade, while the distribution between compartments was hardly influenced. The ratio between above-ground and stem biomass was about 1.21 at stand level, while the ratio between below- and above-ground biomass was about 0.17. Thinning influenced the C stock of the forest floor and mineral soil oppositely, resulting in no effect of thinning on total soil C.     

穿心莲种质资源的评价与利用初报

搜集穿心莲种质资源19份,进行种植试验和生物学性状调查,结果表明:各地种植的穿心莲种子纯度不一致、混杂严重,主要存在大叶型和小叶型两种生态类型;不同产地的穿心莲干品重量差异显著,大叶型的茎叶平均干重明显高于小叶型的茎叶平均干重,说明大叶型穿心莲的产量、产值较小叶型穿心莲具有明显的优势。