引种日本落叶松原生种源及优树半同胞家系苗期试验初报   总被引：7，自引：6，他引：1  

宋丛文  周必成  荒井赞  伊藤辉胜  永田义明  侯义梅  陈柏如 《湖北林业科技》2000,(Z1)

引种日本落叶松原生种源及优树半同胞家系苗期试验研究结果表明：原生种源问高生长具有明显差异,确定松本、伊那、日光为优良种源;家系间的高生长也具有明显差异,确定县诹访１号等２０个家系为优良家系;原生种源的遗传变异幅度极大,具有相当的遗传改良潜力和遗传资源保存价值。  相似文献   

CYLINDRICAL BENDING PROBLEM OF RECTANGULAR PLATES STIFFENED ON ONE SIDE ALONG ONE DIRECTION WITH ELASTIC SUPPORTS AND TENSILE FORCES     

Sun Renbo Wang Daiyu Department of Civil Engineering 《保鲜与加工》1989,(4)

On the basis of the calculated results of accurate analytic solution of stiffened rectangular plates,the general equations of cylindrical bending of the plates with tensile forces are established for engineering practice.Its solution combining with engineering problem is given for the special defor-mation conditions of elastic supports.In the paper,the numerical example is given and compared with references,it shows that the results are available.  相似文献   

Root system structure and shoot arrangement of 1-year-old Solanum carolinense L.     

KATSURA MIYAZAKI  MISAKO ITO 《Weed Biology and Management》2004,4(2):122-125

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Naturalization and dissemination of two subspecies of Lindernia dubia (Scrophulariaceae) in Japan     

NAMIKO YOSHINO  GUANG-XI WANG  MISAKO ITO  BRUCE AULD  HIROSHI KOHARA  TAKASHI ENOMOTO 《Weed Biology and Management》2006,6(3):174-176

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Population structure of Solanum carolinense along the Takano River in Kyoto, Japan as determined by amplified fragment length polymorphism analysis     

T IMAIZUMI  S KUROKAWA†  M ITO  B AULD‡  & G X WANG 《Weed Research》2006,46(3):219-225

Areas infested with Solanum carolinense, an introduced perennial weed, have increased quickly in Japan. The genetic structure of a S. carolinense population along the Takano River in Kyoto, Japan was investigated using amplified fragment length polymorphism (AFLP) analysis to reveal how introductions and local spread have contributed to the development of this population. Along a terrace beside the river and an adjacent roadside, we defined a cluster of above‐ground shoots in the population as a subpopulation and 60 subpopulations were identified. Seventeen of these were selected and 165 shoots were analyzed by AFLP analysis using three primer pairs. The AFLP profiles revealed 69 genotypes and the presence of several clones, i.e. genotypes that were present in more than one individual. In total, 19 clones, comprising 2–34 identical genotypes, could be identified in the population. Each of these clones, except one, was allocated within each of the subpopulations. Clustering of the subpopulations was supported by high bootstrap values in all cases. Therefore, introductions from distant regions have mainly contributed to the development of this population, and local spread by seed or vegetative reproduction has rarely been important. The most likely introduction route of S. carolinense to this population was via planting associated with construction works.  相似文献   

Occurrence of Pennisetum polystachion ssp. setosum on the roadside verges and in some plantation crops of southern Thailand     

YUKA KOBAYASHI  MISAKO ITO  KLEOPAN SUWANARAK  WANLOP NOOPRADIT  CHARUCK BOONSRIRAT 《Weed Biology and Management》2003,3(1):57-60

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Successful use of prednisolone and radiation therapy in a dog with intracranial histiocytic sarcoma     

Tomoko TAKAHASHI  Yumiko KAGAWA  Daisuke ITO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(11):1782

The ideal treatment for intracranial histiocytic sarcoma (HS) remains unclear. Herein, we report a case of intracranial HS that was successfully treated using prednisolone and radiation therapy. The patient was a 9-year-old spayed female Pembroke Welsh Corgi that presented with epileptic seizures. Magnetic resonance imaging revealed a contrast-enhancing mass adjacent to the right piriform lobe. Prednisolone administration (1 mg/kg/day) decreased the lesion size. Additional palliative radiation therapy (total dose, 37 Gy) resulted in complete disappearance of the lesion. However, on day 164, the dog’s neurological signs deteriorated, and she was euthanized. Necropsy revealed an intracranial metastasis of HS via the cerebrospinal fluid without any extracranial metastasis. Nonetheless, combined prednisolone and radiation therapy might be effective in treating intracranial HS.  相似文献   

南方传统农区乡村生态空间时空演变分析   总被引：1，自引：0，他引：1  

费建波  夏建国  胡佳  马黛玉  赵涛  吴玺 《农业机械学报》2020,51(2):143-152

以川中丘陵区为例,在提出乡村生态空间分类体系基础上,采用转移速率、动态度、转移矩阵、洛伦兹曲线和生境质量评估等方法分析传统农区生态空间在数量、组成结构和空间分布的时空演变特征及其对生境质量的影响。研究表明:川中丘陵区乡村生态空间约占国土空间总面积的98%,人均生态空间面积达1 640. 68 m2; 2000—2018年,乡村生态空间从88 298. 72 km~2降至87 322. 22 km~2,年均缩减量为54. 25 km~2,综合动态度为0. 41%,生态空间转移率为0. 20%,农田和森林生态系统是构成乡村生态空间的主要成分,两者在近20年间的保留率均超过90%,这表明随着时间的推移,传统农区生态空间数量虽在减少,但整体结构依然稳定。生产生态空间和基础生态空间分布基尼系数分别在0. 08和0. 34左右,表现为绝对平均和相对合理的空间分布形态,说明传统农区生态空间总体上呈现出均衡且稳定的空间分布格局。川中丘陵区生境质量整体不高,2000年、2010年和2018年的生境质量指数分别为0. 310、0. 311和0. 309,生境质量指数呈先上升后下降的趋势,与乡村基础生态空间的数量改变呈正相关关系。  相似文献   

Dynamic left ventricular outflow tract obstruction secondary to hypovolemia in a German Shepard dog with splenic hemangiosarcoma     

Takuma AOKI  Hiroshi SUNAHARA  Keisuke SUGIMOTO  Tetsuro ITO  Eiichi KANAI  Sakurako NEO  Yoko FUJII  Yoshito WAKAO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(9):1187-1190

Dynamic left ventricular outflow tract obstruction (DLVOTO) is a common condition in cats and humans. In this case report, a dog is described with DLVOTO secondary to severe intra-abdominal hemorrhage caused by a hemangiosarcoma. The dog was a 9-year-old, 35.7-kg, spayed female German Shepard dog that presented with a history of tachypnea and collapse. A Levine II/VI systolic murmur was present at the heart base. Abdominal ultrasonography revealed a splenic mass and a large amount of ascites. Echocardiography showed a reduced left ventricular diameter and an increased aortic velocity caused by systolic anterior motion (SAM) of the mitral valve apparatus. The heart murmur and the SAM were resolved after treatment including a splenectomy and a blood transfusion.  相似文献   

马尾松早期促进开花结实方法的研究   总被引：4，自引：0，他引：4  

张锐  伊藤辉胜 《湖北林业科技》2000,(Z1)

１９９７年在京山县太子山林场５年生马尾松无性系种子园内,用三种生长调节剂Ｃ．Ｃ．Ｃ．ＧＡ,ＢＡＰ分施用量、处理时期、处理次数三个因素进行叶面喷洒实验。结果表明ＢＡＰ有促进开花的作用。１９９８年在中心苗圃３年生嫁接苗实验区,利用１９９７年对促进开花结实有效果的ＢＡＰ进一步分时期、处理次数二因素进行了实验,结果表明ＢＡＰ对马尾松苗期开花也有明显的促进作用。两年的实验结果表明,ＢＡＰ能促进马尾松早期开花,这对缩短马尾松育种周期,加速新品种的开发具有非常现实的意义。  相似文献