乐平市晚稻寒露风灾害风险区划

利用景德镇市气象局观测站、乐平市气象局观测站和气象哨所1958～2010年的观测资料,分析了乐平市9月11日～10月10日期间日平均气温≤22℃持续3d或日平均气温≤22℃持续2d且其中1d最低气温≤16℃,日平均气温≤20℃持续3d或日平均气温≤20℃持续2d且其中1d最低气温≤16℃的发生情况;并以稳定通过22℃的终日作为轻度寒露风的标准、稳定通过20℃的终日作为重度寒露风的标准,统计出现频率为10％（10a一遇）、20％（5a一遇）、25％（4a一遇）、33％（3a一遇）、50％（2a一遇）、66％（3a二遇）、75％（4a三遇）、80％（5a四遇）、95％（1a一遇）的日期,以及这些日期随海拔高度的变化情况;最后利用ARCGIS软件,采用1：250000的地理数据,对乐平市晚稻轻度和重度寒露风进行了风险区划。结果表明：乐平市大部分地区轻度寒露风发生的频率为2a一遇,重度寒露风发生的频率为5a一遇;洪岩镇、涌山镇、塔前镇、双田镇、高家镇、众埠镇、名口镇、十里岗乡、礼林镇等地海拔为100rn的山区轻度寒露风发生的频率为3a二遇,重度寒露风为3a一遇;海拔为200m的山区轻度寒露风发生的频率为4a三遇,重度寒露风为2a一遇;在海拔为300m的山区轻度寒露风发生的频率为4a三遏,重度寒露风为3a二遇;在海拔〉400m山区轻度、重度寒露风发生的频率均较高,不适宜晚稻种植。在农业生产上,要科学运用寒露风预测,合理安排生产;同时选育抗低温高产晚稻品种,加强田间管理,改善农田小气候来防御寒露风为害。     

Outcomes of pituitary tumor irradiation in cats

BACKGROUND: Information on tumor control and normal tissue effects of radiotherapy to treat pituitary tumors in cats is limited. HYPOTHESIS: Radiation therapy is effective in controlling the clinical signs associated with pituitary tumors in cats, with a low incidence of adverse effects. ANIMALS: Eight cats were irradiated at Colorado State University between 1991 and 2002 for spontaneous pituitary tumors. METHODS: A retrospective review of records was made to assess tumor control and incidence of radiation-induced adverse effects. RESULTS: Pituitary carcinoma was diagnosed in 2 cats and pituitary adenoma in 6 cats. Total radiation dosage ranged from 4,500 to 5,400 cGy administered Monday through Friday in 270 or 300 cGy fractions. Acute effects were limited to epilation and mild otitis externa. Focal brain necrosis adjacent to regrowth of a pituitary carcinoma and a second tumor in the radiation field were reported as possible late effects. Median survival, regardless of cause of death of the 8 cats, was 17.4 months (range, 8.4 to 63.1 months). Median survival could not be determined if cats were censored for non-tumor-related causes of death. Six cats were alive at 1 year, and 3 cats were alive at 2 years after treatment. Tumor recurrence was seen in 1 cat with a pituitary carcinoma. Neurologic signs improved within 2 months in all 5 cats that presented with abnormal neurologic signs. Clinical signs caused by a concurrent endocrine disorder began to improve within 1-5 months in the 7 cats with hyperadrenocorticism or acromegaly. CONCLUSIONS AND CLINICAL RELEVANCE: Radiation therapy is an effective primary treatment modality for cats presenting with neurologic signs associated with a pituitary mass and can improve clinical signs associated with concurrent hyperadrenocorticism or acromegaly in cats with no neurologic abnormalities.     

NH3 Volatilization from Aboveground Plants of Winter Wheat During Late Growing Stages

Ammonia volatilized from aboveground parts of winter wheat was collected with an enclosuregrowth chamber and measured from jointing to maturing stage. The results showed that ammonia releasedfrom unfertilized plants grown in high and low fertility soils remained at low rates of 2.3 and 0.9 μg NH3 40plant-1 h-1 respectively at late filling stage. However, fertilized plants rapidly increased the rates to 43.4 and52.2 μg NH3 40 plant-1 h-1 in the high and low fertility soils, respectively, at the same period. The released a-mount was different in different parts of plants. At filling stage, lower senescing stems and leaves volatilizedmore ammonia than upper parts, i.e. , ears and flag leaves that grew normally, with an average of 1.4 and0.7 μg NH3 20 plant-1 h-1 respectively, strongly suggesting that it was the senile organs that released largeamounts of ammonia. At the grain filling stage, shortage of water supply (drought stress) reduced ammoniavolatilization. The average rate of ammonia released under water stress was 0.9 μg NH3 40 plant-1 h-1 , but 1.2μg NH3 40 plant-1 h-1 with moderate water supply. Application of N together with P fertilizer resulted in ahigher ammonia volatilization than N fertilization alone at the maturing stage. The average rate released was135.3 μg NH3 40 plant-1 h-1 when 0.4 g N and 0.13 g P had been added to per kg soil, while 33.7 μg when0.4 g N added alone. Ammonia volatilization from plants was closely related with plant biomass and N up-take; P fertilization increased plant biomass and N uptake and therefore increased its release.     

Oospore formation by Phytophthora infestans in host tissue after inoculation with isolates of opposite mating type found in the Netherlands

Samenvatting Uit combinaties van A1- en A2-paringstypen vanPhytophthora infestans werden zowel bij tomaat als bij aardappel oösporen verkregen in de plant. Oösporen werden niet in de bladeren gevormd, maar werden veelvuldig aangetroffen in de epidermis van de stengels. De proeven werden uitgevoerd in de klimaatkamer; de veldsituatie moet nog onderzocht worden.     

应用细胞工程选育早熟优质晚粳85—1

将日本晴与黎花17杂种第二代植株的适宜时期的花药,采用细胞工程技术培育而成的85—1新品系,自1986年起经过9个县(市)12个试验、示范点作单、双晚种植,结果表明:株形优良,生长青秀,光照姿态好,后期转色佳;根系健壮发达、不早衰;穗大粒多,结实率在95%左右,米质优;熟期整齐,熟相好;全生育期108—120天,平均亩产350—400公斤;大田种植期间从未发现病害。目前已在省内外适宜地区扩大生产应用。     

New multilocus genotypes of <Emphasis Type="Italic">Phytophthora infestans</Emphasis> in Japan

Twelve isolates of Japanese Phytophthora infestans, which differed from the major genotypes US-1, JP-1, JP-2, and JP-3, were analyzed for RG57 fingerprints, mtDNA haplotypes, two allozyme genotypes, and mating types. Genotypes JP-1.1, JP-2.1, JP-2.2, JP-3.1, and JP-4 were newly defined. JP-1.1 and JP-2.1 were isolated discontinuously from potato fields in several years, and JP-1.1 was found in Hokkaido and Kagoshima. These results show that some minor genotypes can overwinter and disperse from their original site.     

晚熟柑橘新品种‘明柳甜橘’

 ‘明柳甜橘’是从春甜橘芽变中选育的新品种。经过多点区域试验和品种比较试验表明, 该品种树势生长强健, 果实外观漂亮, 无籽, 清甜化渣, 可溶性固形物含量12.7% , 品质上等, 早结丰产性好, 抗逆性强, 丰产稳产, 果实成熟期在2月下旬至3月上旬。     

猕猴桃晚熟新品种-中猕1号选育

中猕1号猕猴桃是实生选育的优良品种。1990年在河南省西峡县的山区进行调查搜集优异种质,共收集优良单株40个。原编号29的单株为美味猕猴桃,经13年连续观察和多点试种,表明该单株有如下优点:抗逆性强,在干旱和山区栽培条件下,仍能健壮生长;早果性和丰产性好;果个大,在相同条件下比海沃德和秦美果个大;果肉绿色,果心很小,种子少,风味甜,有浓郁清香味,风味优于秦美;贮藏性与海沃德相似,但货架期比海沃德短。     

三种芸薹属蔬菜花器形态与花粉发育时期相关的细胞形态学观察

对几种芸薹属蔬菜花粉发育的各个时期的细胞学形态进行了观察,并以此为依据计算不同蕾长、瓣药比中单核靠边期和二核期的花粉细胞占总花粉细胞的比例.统计分析结果表明:当瓣药比在1左右时,三种蔬菜花药中所含的单核靠边期和二核期花粉粒占的比例最大.     

耐抽薹白菜新品种寒绿的选育

寒绿是以上海地方资源青油菜自交系9102S为母本、天津地方资源青油菜自交系9107S为父本配制而成的白菜一代杂种。耐抽薹性比对照五月慢显著增强，株高18cm，开展度18cm，单株质量80g左右，叶数12片，叶片鲜绿，叶柄浅绿，每667m^2产量2000-2400kg，适宜北方地区冬春保护地及早春露地栽培。