速溶茶渣饲用价值研究：Ⅰ.速溶茶渣对育肥猪的饲养效果

为探寻速溶茶湘对畜禽的饲用效果,在饲粮中加入５％的速溶茶以替代５％的麦麸进行对比试验。结果表明：速溶茶渣对生长育肥猪的生长及肉质无显著影响（Ｐ〉０．０５）,且试猪血液中５种化学成分含量和６种酶活性亦无显著变化（Ｐ〉０．０５）,适当搭配可以用作生长育肥猪的饲料原料。     

云杉幼苗猝倒病化学防治药剂筛选

通过试验,对云杉猝倒病（Ｒｈｉｚｏｃｔｏｎｉａｓｏｌａｎｉ,Ｆｕｓａｒｉｕｍｓｐｐ）化学防治中使用的杀菌剂进行了筛选,结果表明,杀菌剂的混合使用可以明显提高防治效果。混合使用防治效果较好的为福美砷＋代森锌、退菌特＋代森锌、甲基托布律＋代森锌、甲基托布津＋退菌特、多菌灵＋福美砷等。如果单用,防治效果优劣依次为退菌特,甲基托布津,多菌灵、福美砷,代森锌。     

陕西省南部地区土壤粘粒特性研究

陕西南部土壤粘粒特性的研究发现,陕西省南部北亚热带湿润地区,发育在第四纪下蜀黄土母质上的土壤粘粒含量高,粘化层不明显,粘土矿物以伊利石和蒙脱石为主,粘粒铁富集明显;发育在基岩风化物母质上的土壤粘化层明显,粘土矿物以蒙脱石、蛭石为主,且有一定量的高岭石,粘粒中铝富集强烈。中山区暖温带湿润地区的土壤,粘粒含量较低,粘土矿物以伊利石、绿泥石为主,粘粒中铁、铝富集均不明显,元素的淋溶迁移较弱。     

生物碱化学生态学与害虫管理

生物碱是自然界中分布最广的一类次生代谢产物之一。它可以在正确的时间、正确的位置和正确的浓度出现,以充分发挥其生态防御功能。就生物碱化学生态学的研究概况及其在害虫管理中的应用作一概述。     

小兴安岭泥炭藓湿地土壤有机碳分布特征

 在小兴安岭林区乌伊岭国家级湿地自然保护区,选择典型泥炭藓湿地进行土壤样品采集,对土壤有机碳（SOC）质量分数、密度及储量进行研究,并分析SOC质量分数与土壤理化性质之间的相关性。结果表明:1)SOC质量分数随土层加深而减少,变化范围在433.89～523.36g/kg之间,平均质量分数为474.27 g/kg;土壤有机碳密度随土层的加深而显著增加,0～60cm土层土壤有机碳储量为166.07t/hm2。2)SOC质量分数与非毛管孔隙度存在极显著的正相关关系,幂函数方程拟合效果显著;SOC质量分数与毛管孔隙度呈极显著负相关,二次曲线拟合效果较好（R2=0.87）;SOC质量分数与土壤密度呈极显著负相关,线性方程拟合较好（R2=0.81）。SOC质量分数与全N、全P质量分数呈显著负相关,与有效P质量分数呈极显著正相关,与水解N质量分数相关不显著。研究结果可为我国湿地土壤有机碳储量及碳循环的进一步研究提供帮助。     

柑桔黑刺粉虱发生规律及防治

对柑桔黑刺粉虱的生活习性,发生规律,有效积温,天敌种类和药剂防治等进行了比较系统的研究,该虫在广东一般１年发生５代,第１代成虫出现份,１１月下旬以后若虫和蛹开始越冬,发育起点温度为１１．０１℃,完成了１个世代所需有效积温为７９１．２７日度。     

柴达木盆地盐湖资源开发的市场条件分析

本文结合柴达木盐湖资源开发 ,对国内盐湖化工产品 ,主要是钾盐、镁盐、钠盐、锂盐、溴、碘、硼的市场需求进行分析 ,供开发决策时参考     

Alley cropping of maize with calliandra and leucaena in the subhumid highlands of Kenya: Part 2. Biomass decomposition, N mineralization, and N uptake by maize

A major challenge in developing agroforestry approaches that utilize tree-leaf biomass for provision of N to crops is to ensure synchrony between the N released from decomposing prunings and N demand by crops. A study was conducted in the subhumid highlands of Kenya to assess the rate of decomposition and mineralization of soil-incorporated Calliandra calothyrsus Meissner (calliandra) and Leucaena leucocephala (Lam.) de Wit (leucaena) tree biomass and maize roots (Zea mays L.) both in an alley cropping and a sole cropping system. The amount of mineralized N peaked four weeks after planting (WAP) maize in all the treatments during both seasons of 1995. Cumulative mineralized N at week 20 ranged from 114 to 364 kg N ha⁻¹ season⁻¹, the absolute control treatment giving the lowest and the prunings-incorporated treatments giving the highest amounts in the two seasons. Total N uptake by maize, ranging from 42 to 157 kg ha⁻¹ season⁻¹, was lowest in the 'alley-cropped, prunings-removed' treatments, and highest in the 'non alley-cropped-prunings-incorporated' treatments. The apparent N recovery rate by maize was highest in the fertilizer applied treatments in the two seasons. Decomposition rate constants (kD) ranged from 0.07 to 0.21 week⁻¹, and the rates among the different plant residues were as follows: leucaena < calliandra < maize roots. Nitrogen release rate constants (kN), ranging from 0.04 to 0.25 week⁻¹, followed a similar pattern as the rate of decomposition with leucaena releasing the highest amount of N followed by calliandra and lastly by maize roots. This revised version was published online in June 2006 with corrections to the Cover Date.     

大连地区美国白蛾的综合治理技术初报

美国白蛾属世界性检疫害虫,在大连地区发生较普遍．多年来,对其防治措施进行了探讨和研究,摸索出了综合治理方案,即以营林为基础,调整植物群落;利用美国白蛾的生物学特性,采取适宜的人工防治措施;生物防治是治本性措施,前景广阔;生物农药防治和化学防治是急救措施．     

Cephalosporins – pharmacological basis of clinical use in veterinary dermatology

Cephalosporins form a large group of β-lactam antibiotics which are used extensively in human medicine and to a lesser extent in domestic animals. In veterinary dermatology, the principle use for the cephalosporins is the clinical management of canine pyoderma associated with Staphylococcus intermedius . In practice, the use of orally administered first generation cephalosporin drugs to affected dogs is well tolerated and highly efficacious. Bacterial drug resistance appears to occur rarely.