2000, 19(1).
Abstract:为了评价中灿杂交组合产量性状对高温的适应性,在开花期对3份Ⅱ优新组合进行了人工气候和分期播种的系列温度处理。结果表明,在人工控制气温条件下,这些组合的结实性在开花期的适宜日均温度为27 ̄29℃,高于32℃的日均温即引起结实性明显降低。供试组合在高温下结实性的稳定性依次为:汕优63〉Ⅱ优501〉Ⅱ优838〉Ⅱ优63。
Wang Mo(Huazhong Agricultural University , Wuhan
2000, 19(1).
Abstract:The susceptible toxicity baseline of parathion , methamidophos, monocrotophos and profenofos to newly hatched larave of pink bollworn (Hubei Province), Pectinophora gossypiella (Saunders), were established by using filter paper re
2000, 19(1).
Abstract:9512-1乳油是联华实验室开发的阿维菌素类农用杀虫杀螨剂。室内用浸叶法,分别测定了1%9512-1乳油对烟草主要害虫烟青虫、烟蚜的毒力,表明1%9512-1乳油对供试昆虫有突出的毒杀效果,其2000倍液对2龄和3龄烟青虫在72h内死亡率分别达87.77%、100%;对烟蚜的LC50值为0.33mg/L。田间实验表明,1%9512-1乳油对烟蚜的防效高于90%,15d后可高达95.4%。
Chen Li Xu Hanhong Zhao Shanhuan
2000, 19(1).
Abstract:吴文君曾详细介绍了昆虫拒食剂的生物测定方法,包括圆叶片法及改进的圆叶片法、体重法、排泄物法和电讯号法[1]。测试方法不同,昆虫拒食剂拒食活性的数字表示就会不同。大多数植物次生代谢物,如印楝素、川楝素、苦楝醇等的拒食活性常用甘蓝叶碟法进行选择性和非选择性测定。为了探索除测试方法、供试昆虫、温度、湿度、光照之外的因子对昆虫拒食剂拒食活性的影响,现用不同厚度的甘蓝叶碟测定了川楝素对菜粉蝶5龄幼虫的拒食活性。1 材料与方法1.1 供试材料川楝素粉(含量为75%)由四川省宜宾地区红光制药厂提供。供试昆虫为菜粉蝶(Pieri…
2000, 19(1).
Abstract:用8-羟基喹啉、甲醛、间苯二酚及苯磺酸钠用原料合成了一种螯合树脂。这种树脂在pH为5时对重金属交换吸附具有很强的选择性,其对Cu^2+,Hg^2+和Pb^2+的交换容量分别为318、224和202cmol/kg。在此条件下,其对Mg^2+的交换容量仅为上述金属离子的1/10 ̄1/8。试验证明,在pH〈5时,树脂的H^+离子和重金属离子的交换比例为2:1。因此,在树脂态和酸性范围中,8-羟基喹啉与金
2000, 19(1).
Abstract:将鄂东南第四纪红色粘土发育的棕红壤分别与5种植物物料混合,进行腐解试验。研究表明:各种作物的秸秆在初期分解量较大,物料混合土样的含硼量在分解初期迅速下降,最后接近土壤有机硼含量;硼的释放较有机物质矿化要快,其半释放期在30 ̄43d,99%的有机硼释放时间在274d,而99%的有机物分解在574d。
Liu Yixin Liu Wuding Zhu DuanweiCheng Dongsheng
2000, 19(1).
Abstract:The crystal organic fertilizer was applied into the experimental soil at different level and the soil was cultured for one month to study the effect of crystal organic fertilizer on adsorption desorption property of soil phosphorus. The results showed t
2000, 19(1).
Abstract:Effects of mycorrhizal colonization by Glomus mosseae 93 on survival,penetration of Meloidogyne incognita of tomato was studied.The number of gall formed on mycorrhizal plants was low. The penetration rate was significantly lower than that of non
2000, 19(1).
Abstract:研究了用溴化乙锭诱变、升温和添加SDS等3种处理对苏云金芽胞杆菌质粒稳定性的影响。结果表明,用4.5μg/ml的溴化乙锭处理野生菌株YBT-1520和HD-567,对其携带ICPs基因的质粒的稳定性无影响。升温至42℃时,野生菌株YBT-1463和YBT-9603的携带ICPs基因的质粒分别有0.41%和0.37%发生丢失,一些小质粒(〈2kb)也发生丢失。继续升温至44℃和46℃培养变株BMB1
2000, 19(1).
Abstract:Antibiotic in vivo was purified and extracted by chromatography and crystallization from Streptomyces NND?52. The physico chemical and biological properties of the antibiotic were studied. The results showed that the antibiotic's properties are t
2000, 19(1).
Abstract:利用聚合酶链反应(PCR)技术,检测了不同猪品种的ESR基因
2000, 19(1).
Abstract:Hubei White sows were injected with PMSG and HCG for superovulation and then mated after oestrus. Collected embryos by operation and observed in the right time . The result shows that, for the young sows,10 IU/kg PMSG could stimulate the oestrus and in
2000, 19(1).
Abstract:以湖北白猪Ⅱ系、Ⅴ系、Ⅵ系为母体,以杜洛克、大白猪、长白猪、施格猪为父本,开展了白猪Ⅴ、Ⅵ系配套杂交利用研究。通过肥育性能和胴体性能测定,结果表明:大Ⅴ、大Ⅵ两配套组合优于其它组合,两配套母系75日龄至90kg平均日增重分别为712.5g、709g,与湖北白猪Ⅴ、Ⅵ系相比分别提高14.84%(P〈0.01)、15.45%(P〈0.01),与施Ⅴ、施Ⅵ、长Ⅱ相比差异极显著(P〈0.01);达90kg
Hu Xueying Cheng Guofu Zhou ShiqiXiong Daohuan
2000, 19(1).
Abstract:The histopathological changes of inoculated duckling with duck hepatitis virus type I (DHV?I) were observed. The result revealed the degeneration of the hepatocytes,splenocytes, the renal tubule epithelium and the pancreas cells at 12 hours after inoculat
2000, 19(1).
Abstract:用管碟法测定喹赛多对9种共15株离常见病原菌的体外抑菌活性。喹赛多对革兰氏阴性菌和革兰氏阳性菌都有较强的抑菌活性,对鸡大肠杆菌的最低抑菌浓度(MIC)为0.625μg/ml,鸡巴氏杆菌为1.25μg/ml、金色葡萄球菌为2.5μg/ml,可见对革兰氏阴性菌的抑菌作用略强于革兰氏阳性菌。其抑菌活性比金霉素弱,与喹乙醇相近,比磺胺二甲嘧啶强。结果表明,喹赛多是一种较强的抑菌剂,可作为添加药物用于预防畜
2000, 19(1).
Abstract:从细菌性败血症流行后的饲养池中捕捞翘嘴鳜,采集血清,以嗜水气单胞菌的福尔马林灭活菌体,菌体脂多糖,精制LPS和胞外产物为反应抗原,对其抗体特性进行了分析。结果表明,受检翘嘴鳜血清中对F-LPS和LPS的平均凝集抗体效价分别为1:191和1:69,对LPS和P-LPS在琼脂内扩散反应后分别出现4条以上和1条沉降线,而对ECP则未出现沉降线;免疫电泳后,对LPS和P-LPS分别出现5条以上和2条沉降线
2000, 19(1).
Abstract:The histology of digestive tract of Silurus meridionalis larvae after hatching (from 1 to 43 days) was observed. The histological structural changes of some tissues or organs (mouth, oral and pharynx cavity, esophagus, stomach, foregut, hindgut) were
2000, 19(1).
Abstract:The peroxidase isozymic patterns (PIP) of the dormant buds taken from 3 cross combinations,29 hybrid seedings and their parents were detected by polyacrylamide electrophoresis.The results showed that dormant bud was an ideal sampling part to research PIP
2000, 19(1).
Abstract:The effects of spraying Zaoshuling (a new formula of plant growth regulator) on yields and quality of Newhall Navel with 5 to 7 year old trees were studied. Results showed that the fruit coloring occurred earlier, and Vc increased 22.28% by 15.86%. Sol
Yao Jialin Fu Chunhua Hu Chungen
2000, 19(1).
Abstract:Embryological investigation was made on Gaixian Great Plum ( Prunus salicina Lindle). The observation indicated that some unusual phenomena during pollination and embryo development were involved in fruit drop. These phenomena were as follows: 1)Retard
2000, 19(1).
Abstract:The relationship between fruit growth and main nutritious substances accumulation in ovary of Chinese chestnut was studied with pathway analysis. The results showed that, the diameter growth of normal chestnut involucre and nut followed a Double S model.
2000, 19(1).
Abstract:The cold-tolerance provenance's and the common provenance's test stands of exotic loblolly pine were planted in south of Henan Province of China in 1984 and 1985. The distinct differences in tree height, tree diameter at breast height, tree volume and ste
2000, 19(1).
Abstract:A comprehensive and systematic study on the fireproof characters of 45 kinds of trees in 6 ecological regions of Hubei Province. It gave a synthetical judgement to the combustibility and the ecological and biological characters on fire resisting and the e
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