Abstract:Through accurate and multiple differential GPS (ProMARK X-CM),a program of dynamical monitoring reclaiming coastal land, concerning field data collection, data process and map match with TM image was established in study area, Tongming Sea of Zhangjiang and He'an Township of Xuwen County, Guangdong Province. The research results indicated that (1) Using GPS data as control points, the precision of geometric correction of TM image was raised. (2) Aided by the GPS data, the classification accuracy of TM image was improved. (3) The GPS could be able to collect current data of enclose tideland for cultivation engineering.

Abstract:An orientational experiment is made, using Magellen Promarx X cm GPS, in the forest in Xiaozhen District, Xinfeng County, Guangdong Province. Results are as follows: the satellite's signal receiving will be influenced by crown coverage, the GPS antenna type and the antenna height. The orientation using GPS can be carried out in Chinese fir forest. The error which GPS datum supposed TM images is less than one pixel. DGPS method can be applied to forest survey in mountainous area in South China.

Abstract:Crossing, self crossing and backcrossing were conducted with parents which have long fruit and short fruit. The data of experiment were analyzed by applying principle of quantitative genetics and the results showed that the fruit length of angular sponge gourd was a quantitative character controlled by 4 pair of genes. The genetic pattern of fruit length is in accord with pattern of additive dominance. Among all the genetic components of fruit length, the additive is predominant. The narrow heritability is 67.07%. It showed that applying cross breeding to fruit length of angular sponge gourd is better and selecting fruit length character in early generation is available.

Abstract:以准枝（抗裂）、红皮糯（较易裂）和白皮糯（极易型）３种裂果易感性不同的荔枝果实为试材进行研究。发现荔枝果皮细胞鲺抗裂程度有关，其中在果皮细胞形状、细胞大小、海绵状组织差别最显著最抗淮枝果皮细胞大小均匀、内果皮细胞轮郭清晰、海棉状组织网络清晰整齐空隙较小，红皮糯细胞分裂停止比白此糯晚，因而形成的果皮较大。果皮大有助于缓解假种皮生长对果皮造成的压力，减少裂果的发生。细胞分裂停止较早的淮枝裂果少的原因可

Abstract:In this paper, the influence of nitrogen rates on nitrate accumulation and distribution in four vegetables was studied through pot experiment. The results showed that nitrate concentrations in cabbage and garden sass are apparently higher than that of two kinds of spinach. Petiole is an organ in which nitrate concentration is the highest and accumulated nitrate of plant is mainly distributed for cabbage, garden sass and Ningxia spinach. Lateral root, blade and petiole are separately the organ in which nitrate concentration is the highest and accumulated nitrate of plant is mainly distributed under the low, medium and high nitrogen levels for Japanese spinach. With the increase of nitrogen rate, nitrate concentrations of different organs all significantly increase for four kinds of vegetable. The distribution percent of accumulated nitrate increase in blade and trend to decrease in main root and lateral root for cabbage, garden sass and Ningxia spinach as nitrogen rate increased, but this percent gradually decrease in main root and stem for Japanese spinach.

Abstract:Based on the natural population life tables of continuous two generations of the diamondback moth (DBM), Plutella xylostella L., the control effectiveness of Trichogramma confusum, Oomyzus sokolowsakii and Cotesia plutellae on DBM were simulated and evaluated by using state space equation and addition analysis method of population control. The results were as follows: in spring, any two species of parasitoids mentioned above could effectively control DBM population increase due to the strong natural control of parasitoids, while both T. confusum and O. sokolowsakii or three species of parasitoids released simultaneously could control the increase of DBM population effectively in autumn,because of the low natural parasitization of O. sokolowsakii and the high increase of population of DBM.

Abstract:通过对黄曲条跳甲自然种群的田间系统调查和人实验种群的饲养观察，组建了以作用因子组配的黄曲条跳甲秋季世代和春季蓼工自然种群生命表，结果表明；黄曲条跳甲秋季世代和春季世代种群趋势指数（１）分别为１４．６３和３．８６，表明下一代种群数量将为当代种群数量的１４．６３和３．６８倍，在田间，没有发现寄生性天敌，春季世代“捕食及其经”的除作用控制指数（ＥＩＰＣ）为１．３１，表明该作用因子对黄曲条跳甲的控制作用不

Abstract:黄杜鹃（Ｒｈｏｄｏｄｅｎｄｒｏｎ ｍｏｌｌｅ）－Ⅲ在花、嫩叶、根、茎中的含量分别０．２０％、０．１４％、０．１１％、０．０８％，其花、嫩叶、根的粗提物对菜粉蝶５龄幼虫和斜纹夜蛾３龄幼虫具有一定的拒食作用，而茎无明显的拒食效果、黄杜鹃花、嫩叶、根、茎各部位甲醇粗提物在ψ＝１．００％时对菜粉２４ｈ的拒经分别为９２．７％～８６．７８％、７４．９０％、６３．８０％。对斜纹夜蛾３龄幼虫的拒食率分别为８９．９

Abstract:助剂ＹＺ－９０５能显著提高杀虫双药液的湿展能力，使药液在固体表面展开面积增加１．８５～３．１７倍，提高药剂在叶表面的沉积量０．６３～０６．９倍，使防治菜粉蝶幼虫增效６．８％～１９．５％，防治小菜蛾幼虫增效２４．５％～３６．９％杀虫双降解动态符合一级动力学方程，加入ＹＺ－９０５合适的比例约为０．０３％。

Abstract:Three new species of Epilachna Chevrolat from Sichuan Province of China were described. They were Epilachna dictyodroma sp. nov., Epilachna omeiensis sp. nov.and Epilachna arytaenoidea sp. nov., The type specimens are deposited in the Insects Collection of South China Agricultural University.

Abstract:通过实地调查和资料收集，分析了广东境内的山茶科稀有濒危植物的区系特点和保护价值，并提出了保护对策，广东共有８种山茶科稀有濒危植物，除金花茶外，包含了中国第一批山茶科稀有濒危植物的呈星散分布，仅见于省内几个地点，每个地点公见少数植株，濒危状况与区系的特有现象紧密相点，其中最突出的是圆籽荷（Ａｐｔｅｒｏｓｐｅｒｍａ ｏｂｌａｔａ）和猪血木（Ｅｕｒｙｏ＃ｄｅｎｄｒｏｎ ｅｘｃｅｌｓｕｍ），仅见于云开大山

Abstract:Root morphology and mycorrhizas of the 3 year old saplings of Tsoongiodendron odorum, Bretschneidera sinensis, and Eurycormbus cavaleriei at the nursery of Chebaling National Nature Reserve were studied. Three species could form vesicular arbuscular mycorrhizas. Their infection rates were 84.4%, 81.1%,55.6%, respectively. These species are different in root morphology, but all of them do not have root hair, which may indicate their high dependence on mycorrhiza. The VAF spore density was low in the soil of the study site. One spore type was isolated from the soil of Eurycormbus cavaleriei and two types were from that of Bretschneidera sinensis . Further study on the ecology of the mycorrhizas of these protected species is of importance in conservation and development of these rare plants.

Abstract:双红花大金元品种的烟草为材料，采用细胞悬浮培养方法，对影响烟草生长和ＣｏＱ１０含量的细胞培养条件、ＰＨ、温度、接种量、扔床转速及装液量等进行了研究。结果表明，烟草细胞在培养基原始ＰＨ４．０～８．０下均能生长，但在ＰＨ６．０时细胞生长最地，ＣｏＱ１０含量最高；接种量仅能影响细胞培养周期，而不影响ＣｏＱ１０的形成，但超过２８℃则不利于烟草细胞的生长，ＣｏＱ１０总量并不增加；摇床转速和装液量对细胞生长和

Abstract:The polyphenol oxidase activity in rice is controlled by five pairs of minigenes at least. Additive effect is mostly factor within genetic effect, there are also fairly dominant effect, and not exiting epistasis effect. There are strongly genetic correlation between the polyphenol oxidase activity in rice and resistance to bacterial blight ( Xanthomonas campestris PV. Oryzas ). There was four other pairs of actived minigenes at least infected by bacterial blight.

Abstract:用来源丰富且廉价，并具有许多优良生物特性的壳聚糖为原料，以简单易行的服交联法制备壳聚糖微球，并对其性状进行和分析。结果表明：它复合了壳聚糖与高分子微球的功能，然后，以壳聚糖微球为载体，用吸附－交联的联合固定化方法制备固定化木瓜蛋白酶，并研究了木瓜蛋白酶的最佳固定化条件。结果显示：木瓜蛋白酶的最佳固定化条件是给酶量为１．９２ｍｇ／ｇ、４～８℃吸附１２ｈ，再用体积分数为０．５％的戊二醛溶于４～８℃交联

Abstract:从青霉菊（Ｐｅｎｉｃｉｌｌｉｕｍ ｎｏｔａｔｕｍ）中获得了一种葡萄糖氧化酶，经ＤＥＡＥ－Ｓｅｌｅｃｔａｃｅｌ柱层析，法脱经超滤浓缩，加入保护剂冷冻干燥，制得冻干粉，并与进葡萄糖氧化酶进行比较，证明该葡萄糖氧化酶冻干粉的活力及稳定性街道中项指标已达到进口产品的水平。

Abstract:The contents of soluble proteins and chlorophyll of the detached leaves of rice treated by triadimefon(mass concentration=20 mg/L) increased. The results indicated that triadimefon retarded the senescence of rice leaves. During the senescence of detached rice leaves, both the activities of superoxide dismutase and catalase and the contents of ascorbic acid and reduced gluthione decreased, which was inhibited by triadimefon. These results suggested that triadimefon enhanced the protective ability against enhanced lipid peroxidation.

Abstract:Rice was very sensitive to acetochlor. Rice seedlings were injured when acetochlor was used in rice field. But acetochlor showed less phytotoxicity to rice seedling when used in combination with protectant CGA 123407 . The activities of endogenous protective enzymes, superoxide dismutose (SOD), peroxidase (POD) and catalase (CAT) were studied, and the results showed that the effect on the activities of endogenous protective enzymes was not the main injury mechanism of acetochlor.

Abstract:The effects of pH, different concentrations of sugar, temperature, light, ultraviolet, nuclear radiation, phosphorous buffer, vitamin C, H 2O 2, and sodium benzoate on the red pigment of Cadiaeum virigatum var. pictum form platyphyllum were studied. It was indicated that this red pigment was a good pigment which was anti reductive, acid and basic tolerant, sugar tolerant, heat tolerant and light tolerant.

Abstract:Eighty day old chickens were randomly divided into two groups ( n =40). The treated group was injected via sternal muscle with thymic factor D at 3 mg/kg body weight every other day from day 1 to 10, while the control group was given the same volume of sterile 0.9% NaCl. All chickens were weighed once a week from day 14 on wards. Blood samples were collected and the concentrations of thyroxine (T 4). Trilodothyroxine (T 3) and growth hormone (GH) in the plasnas were measured by radioimmunoassay (RIA). The percentage of T cells were calculated on day and 23,38. The results showed that: 1) Injection with TFD promoted growth. 2) On day 23, the percentage of T cells between treated group and controe group was significantly different ( P <0.01). 3)The concentration of T 4 between the two groups was different ( P <0.05) on day 23. The concentrations of T 3 and GH of the treated group were higher than those of the control, but the difference was not significant ( P >0.05).

Abstract:There were seven types of antennal sense organs including sensilla coeloconica, sensilla campanulate, sensilla orbiculate, sensilla basiconica, sensilla trichodea, sensilla trichodea and antennal hair in culicoides by scanning electron microscope observation. The patterns of the sense organs on the antennae were described and compared. It was found that the type, number and patterns of the sense organs were different between C. arakawae and C. schultzei , and sensilla coeloconica could be used to discriminate the two species of biting midges. The humeral pits of the same species of midges varied, but the two species of midges had same patterns of maxpalpal sensilla.

Abstract:An isolate suspected to be pseudorabies virus was recovered from dead piglets on a pig farm in Panyu Guangdong. It was characterized by its physicochemical properties, virus neutralization test, animal inoculation, electron microscopy, PCR amplification and in vitro infectivity test. The isolate was found to be sensitive both to chloroform and ether, could be neutralized by the standard pseudorabies Fujian A strain virus antibodies, rabbits inoculated with the isolate developed localized itch and then paralysis before death, electron microscope revealed irregularly round virus particles with envelope and peplomers, PCR amplification of the virus genome yielded a fragment which co migrated with similarly amplified fragment of the Fujian A standard PRV. When titrated in Marc 145 cell culture, the virus titre attained 10 7.5 TCID 50 /mL. The isolate was identified as a pseudorabies virus on the strength of the above findings.

Abstract:A gene expression cassette with molecular size of the insert, a recombinant plasmid containing the PK gene of PRV,equal to vector was cloned through partial repair of the terminal ends of insert and vector, thus transforming them from nonadherent to adherent ones. The constructed gene expression vector of PRV with the report gene was further identified by endonuclear enzyme analysis and the biological activity of expression vector was recognized directly through transfecting cells to detect its transient expression in vitro.

Abstract:The minimal inhibitory concentrations(MICs) of enrofloxacin, danofloxacin and difloxacin for Pasteurella multocida were determined by two fold dilution method in vitro . The inhibitory tests in vitro showed that the MICs of enrofloxacin, danofloxacin and difloxacin was 0.05 , 0.2 and 0.4 mg/L for Pasteurella multocida , respectively. Treatment trials on chickens with experimentally induced fowl cholera were carried out with enrofloxacin, danofloxacin and difloxacin at dosage rate of 5 mg/kg by oral administration twice daily for 3 successive days. Following the treatment with enrofloxacin, danofloxacin and difloxacin (po, 5 mg/kg) against fowl cholera for 3 days, the curative rates of the drugs for Pasteurella multocida infected chickens were 96 7%, 83 3% and 83 3%, respectively. In the Pasteurella multocida infected and untreated groups, mortality of the chickens was 100%. There were no significant difference in weight gains among the three groups given the above drugs.

Abstract:According to the external appearance of pear and apple, and their bruising character, a simple mathematical model was suggested. Compared with the method of summing pixels, the measuring precision could be improved greatly with the aid of this model.

Abstract:Site selection under conditions of constraints is important for a new supplier in the store yard business. This paper presents an improved model for site selection, which is more rational and more versatile than former models. It can be applied to the situation when there exist more than one store yard. It provides the scientific basis for the site selection decision.

Abstract:土壤缺磷是制约我国农业生产发展的重要因素之一,我国南方红壤地区,由于土壤Fe、Al含量高,普通磷肥极易被固定,缺磷现象尤为严重.我们利用有机和无机改性材料活化磷矿粉,在实验室条件下,研制出3种新型改性磷肥,在固磷性极强和有效磷含量极低的红壤上表现了较好的肥效,改性磷肥较普通过磷酸钙生物量增加20%以上,改性磷肥植株吸磷量较普通过磷酸钙也有较大提高[1].为研究其结构变化的改变对其肥效机理的影响,我们对其红外光谱的谱学特征进行了初步研究,现初报如下.

Abstract:横胸步甲属Anaulacus MacLeay 1825属鞘翅目步甲科截翅类(Truncatipennes)横胸步甲族(Anaulacini).该属主要特征为:触角近链珠状,短,不伸达前胸背板基部;后足胫节具长端距,几乎与相当长的第1跗节相等,胫节表面具数列短刺;鞘翅长,将整个腹部覆盖,使腹部末端不能外露(而在截翅类中极大多数类群腹末端是外露的),但翅端钝,整个鞘翅近长卵形;下颚端无毛;前胸背板横,侧缘阔圆,后角钝而不明显,侧缘中部前及后角具2根或更多的毛[1].横胸步甲属仅分布于东洋区.该属共计3种:斯氏横胸步甲A. sterbai Jedlika 1934产于菲律宾,四斑黄胸步甲A. quadrimaculatus Schmidt-Goebel 1846分布于缅甸,带横胸步甲A. fasciatus Schmidt-Goebel 1846则为广布种,分布于印度、斯里兰卡、缅甸、越南、印度尼西亚和菲律宾等地.

Abstract:松树采脂高度多在4.0 m以下,由于胸径测定误差所致材积测算误差超过了允许精度而必须修正[1].目前多通过胸径(或材积)与树干上正常部位直径(或影响因子)之间的关系进行修正[2].如何用胸径测定值直接进行修正,少见报道.