灭幼脲和氟幼灵防治榆紫叶甲的研究   总被引：3，自引：1，他引：3  

迟德富  曲辉 《东北林业大学学报》1995,23(2):40-48

榆紫叶甲是我国榆树的毁灭性害虫。该虫分布广，密度大，食性单一，常年成灾，给防治带来困难。为了避免常规杀虫剂造成的“１年控制，２年发生，３年成灾”的被动局面，利用昆虫生长调节剂灭幼脲Ⅲ号胶悬剂及油剂和氟幼灵胶悬剂及油剂进行防治，可同时杀死幼虫，成虫和卵。灭幼脲Ⅲ号油剂和氟幼灵油剂可杀卵８５％－９０％左右。两种药剂的胶悬剂和油剂均可杀死幼虫９５％－８４％－９０％，卵的孵化率降为１０．６４％－１９．５７  相似文献   

微胚乳超高油玉米籽粒胚乳消减及油分积累的规律     

田树云  张亚平  吴子恺  梁彩梅  陆海峰 《安徽农业科学》2008,36(3):950-952,954

[目的]研究微胚乳超高油玉米籽粒胚乳消减和油分积累规律。[方法]以高油玉米115为对照,研究2种微胚乳超高油玉米籽粒的胚、胚乳、种皮及相应油分的积累规律。[结果]微胚乳超高油玉米在籽粒发育过程中胚乳干重在发育的第27 d达最大,第37 d消减基本结束;胚的重量一直增加,种子成熟时和胚乳的重量相当;整粒干重第32 d达最大。3个玉米品种授粉后的种皮干重一直增加,第32 d基本稳定,整粒油分37 d前一直增加,之后趋于稳定。微胚乳超高油玉米胚乳的油分在17~27 d增加较慢,27~37 d增加迅速,37 d到成熟期下降,比高油115的高很多;胚的油分在17~27 d增加,27 d到成熟期略下降。高油玉米115胚和胚乳的重量一直增加,胚乳的油分一直很低,胚的油分在17~27 d增加。[结论]该研究为微胚乳超高油玉米的籽粒胚乳消减机理研究提供了参考。  相似文献   

抑食肼油剂防治杨干象   总被引：1，自引：0，他引：1  

迟德富苗建才  卜金祥 《东北林业大学学报》1997,25(5):22-24

杨干象是一种世界性的危险性杨树检症害虫，分布广泛．危害严重．是一种毁灭性的蛀干害虫．对杨树威胁极大。为了克服长期大量使用常规杀虫剂．造成对环境的污染．杀伤天敌、害虫产生抗药性的副作用。我们研制一种新型昆虫生长调节荆抑食肼油剂．防治杨干象幼虫使用1％油剂杀虫率达95％、抑食肼油剂对杨干象幼虫具有高效．内吸作用．既有速效性又有较好的持效性、抑食肼油剂的研制为杨干象等蛀干害虫提供一种安全、高效，经济的新型杀虫剂．具有显著的生态．社会和经济效益．可以在生产上推广应用。  相似文献   

热聚乙烯钢丝索在管道跨越工程中的应用     

程梦鹏  孙洪全  代以斌  李东升 《油气储运》2002,21(5):8-10

针对忠武输气管道跨越工程跨度大、管径大、荷载大的特点，对跨越主索的选择进行了分析和比较，比较结果表明，热聚乙烯钢丝索在弹性模量、防腐性能、施工工艺和工程投资等方面具有明显优势，适于忠武输气管道跨越作用，介绍了这种钢丝索在马水河、蚂蝗溪、木龙河和大溪沟跨越工程中的设计与应用，认为其应用经验可为其它管道跨越工程提供借鉴。  相似文献   

白玫瑰挥发油化学成分的研究     

杨文胜  孙丽华  张德志  高铁流  滕玉辉  张伟森 《吉林林学院学报》1992,(2)

本研究采用GC/MS/DS联用技术,分析了白玫瑰花挥发油的化学成分。从分离的的44化合物中,鉴定了41个组分,占挥发油总含量的97.64%。白玫瑰挥发油的主要成分是β—笨乙醇,含量高达86.53%,其次是丁香酚(4.75%)和香叶醇(2.45%)。  相似文献   

Methane fluxes from three ecosystems in tropical peatland of Sarawak, Malaysia     

Lulie Melling  Ryusuke Hatano 《Soil biology & biochemistry》2005,37(8):1445-1453

Methane fluxes were measured monthly over a year from tropical peatland of Sarawak, Malaysia using a closed-chamber technique. The CH₄ fluxes in forest ecosystem ranged from −4.53 to 8.40 μg C m⁻² h⁻¹, in the oil palm ecosystem from −32.78 to 4.17 μg C m⁻² h⁻¹ and in the sago ecosystem from −7.44 to 102.06 μg C m⁻² h⁻¹. A regression tree approach showed that CH₄ fluxes in each ecosystem were related to different underlying environmental factors. They were relative humidity for forest and water table for both sago and oil palm ecosystems. On an annual basis, both forest and sago were CH₄ source with an emission of 18.34 mg C m⁻² yr⁻¹ for forest and 180 mg C m⁻² yr⁻¹ for sago. Only oil palm ecosystem was a CH₄ sink with an uptake rate of −15.14 mg C m⁻² yr⁻¹. These results suggest that different dominant underlying environmental factors among the studied ecosystems affected the exchange of CH₄ between tropical peatland and the atmosphere.  相似文献   

Impacts of chronic marine oil pollution and the murre hunt in Newfoundland on thick-billed murre Uria lomvia populations in the eastern Canadian Arctic     

Francis K. Wiese  Gregory J. Robertson 《Biological conservation》2004,116(2):205-216

We developed a deterministic and stochastic age-based matrix projection population model to assess and quantify the impact of mortality caused by chronic oil pollution and legal hunting on thick-billed murre Uria lomvia populations breeding and wintering in eastern Canada. We calculate the potential population growth rate in the absence of anthropogenic mortality sources using a modeling technique that translates absolute number of birds killed from anthropogenic mortality to potential survival rates in the absence of these anthropogenic impacts. The intrinsic growth rate of the deterministic matrix based on vital rates from Coats Island (λ_d=1.0102), as well as the stochastic growth rate (λ_s=1.0098, 95% C.I. 0.9969-1.0226), matched observed population trends. Hunting mortality reduced population growth rate by 0.020 (0.012-0.039), oiling mortality reduced population growth rate by 0.025 (0.012-0.039). Combined these sources reduced the population growth rate by 0.047 (0.033-0.610). Although thick-billed murre populations are stable or slowly growing in eastern Canada, anthropogenic sources of mortality are reducing the ability of the population to grow, and increase vulnerability in these populations to changes in their environment and other pulse perturbations. Our modeling technique could be used to assess specific anthropogenic impacts on populations where a vital rates and numbers killed are known, but no long-term trend information is available.  相似文献   

Combined microbial community level and single species biosensor responses to monitor recovery of oil polluted soil     

Jacob G Bundy  Graeme I Paton 《Soil biology & biochemistry》2004,36(7):1149-1159

Understanding the effects of oil contamination on the composition and function of soil microbiota entails investigation of the effects of a mixture of hydrocarbons at the community level in a complex environmental matrix. One approach to this difficult problem is to ally a community-level fingerprinting approach with bioassays that have a physiological or functional implication. Two contrasting refined oils (paraffin and motor oil) were used to contaminate soil microcosms, and a simulated bioremediation treatment with nutrient-addition was applied. The indigenous microorganisms were monitored over 103 d using complementary community-level techniques (carbon source physiological profiling using Biolog^® microplates, and phospholipid fatty acid (PLFA) profiling). Changes in the toxicity of the applied oils were monitored using luminescent bacterial bioassays, including Vibrio fischeri and a hydrocarbon-degrading Pseudomonas putida strain. Distinct shifts in microbial community structure and C source utilization profiles were observed as a result of oil contamination. There was some evidence that bioremediated soils were returning to control values by the end of the experiment. This was supported by the bioassay results which showed an initial increase in toxicity as a result of the oil addition which had then decreased by the conclusion of the experiment. The two oils exhibited markedly different toxicity towards the bioassay organisms, with species-specific differences in response. This oil-specific difference was also found in the PLFA profiles which showed the two oil types selected different microbial communities.  相似文献   

油用向日葵新葵19号恢复系654R的选育及利用     

段维  刘胜利  杨涛  赵刚  徐安阳 《安徽农业科学》2015,(23)

[目的]研究油用向日葵恢复系的选育方法。[方法]在现有技术中向日葵恢复系的选择过程比较漫长且结果不明确的情况下,为了改变从杂种一代F1以后连续自交的作法,在早代就开始进行测定其配合力,有目的的选择,方向比较明确,提高选择效率,创造新的优异资源。[结果]选育出油用向日葵新葵19号恢复系654R,该恢复系植株性状好、抗病性好、抗逆性强、配合力高、杂种优势强。[结论]该研究提供了一种油用向日葵恢复系新的选育方法,并对654R进行利用。  相似文献   

包装材料对食用油储藏的影响     

蒋甜燕  魏为连  崔海明  孙日飞 《安徽农业科学》2015,43(32):152-153

采用3种不同的包装形式进行食用油储藏,考察不同包装材料对食用油储藏指标的影响.试验得出,在50℃干燥箱贮藏过程中,不同包装材料灌装的大豆油油样指标变化程度由低到高依次为:玻璃瓶装、PET装、软包装复合食品袋装.可以看出,玻璃瓶对油样的贮藏效果最好.为保持食用油品质,可加入限量的抗氧化剂来弥补包装材料的差异.  相似文献