毛梾种子萌发特性及幼苗生长规律研究   总被引：2，自引：0，他引：2  

康永祥  贠玉洁  赵宝鑫  陈绵  康晋 《西北林学院学报》2012,27(3):62-67,112

对毛梾种子萌发及幼苗生长规律进行了研究,为种子的繁育提供理论依据。采用称重、测量、解剖、TTC法及内含物测定等方法,分别对不同种源地种子形态结构、活力、内含物含量进行测定,研究不同种源间种子萌发特性差异。采用低温层积、激素处理、不同基质处理相比较及定株观测的方法,研究解除种子休眠的有效技术及毛梾幼苗生长节律。结果表明:6个种源地间以陕西杨陵种源为最优种源,河南种质资源最差;陕西杨陵种源采用室外低温层积催芽效果最好,发芽率达46.7%(为直接播种的114倍);使用激素处理以150mg·L-1 GA3的处理最为有效(发芽率达到48.43%);发芽基质以蛭石最好。毛梾幼苗2个生长高峰期分别为5月下旬到6月上旬和7月底到8月上旬。  相似文献   

Relationships between Agronomic Practices, Soil Chemical Characteristics and Striga Reproduction in Dryland Areas of Tanzania     

Kudra Abdul  George N. Chemining＇wa  Richard N. Onwonga 《农业科学与技术》2012,(10):1134-1141

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植物缺磷及菌根信号转导网络   总被引：1，自引：0，他引：1  

顾冕  陈爱群  徐国华 《南京农业大学学报》2012,35(5):133-146

磷是植物生长发育的主要限制因子之一,主要以无机正磷酸盐的形态被植物吸收,而其在土壤中的移动性和生物有效性很低。为了适应磷缺乏的环境,植物进化出了包括与丛枝菌根真菌形成互惠共生体系在内的一系列适应性机制以增强对磷的吸收、转运和再利用等。所有的这些机制均是由复杂而精巧的分子调控网络控制的。近年来众多基因被鉴定并进行功能研究后与该调控网络联系起来,这些基因包括各种蛋白质基因和非编码RNA基因。本文旨在对当前该领域的研究进展作一总结,同时探讨植物缺磷与菌根信号转导途径间可能存在的相互关系。  相似文献   

Seasonal prevalence of coccidiosis in industrial broiler chickens in Faisalabad, Punjab, Pakistan     

Awais MM  Akhtar M  Iqbal Z  Muhammad F  Anwar MI 《Tropical animal health and production》2012,44(2):323-328

The present paper reports the prevalence of coccidiosis in industrial broiler chickens in Faisalabad, Punjab, Pakistan to determine the occurrence of different species of Eimeria in the area and to assess their correlation with the environmental conditions including temperature, humidity and rainfall. The study was conducted from January 2009 to December 2010. Examination of chicken guts revealed 43.89% (n = 3,283/7,480) prevalence of coccidiosis. The highest prevalence (27.04%) was recorded of Eimeria tenella followed by Eimeria maxima (22.42%), Eimeria acervulina (19.89%) and Eimeria necatrix (4.02%). The prevalence of disease was significantly higher (P < 0.05) in autumn (60.02 ± 4.38) followed by summer (47.42 ± 2.92), spring (36.92 ± 2.27) and winter (29.89 ± 3.43). Likewise, prevalence of different species of Eimeria also varied (P < 0.05) in different seasons of the year except that of E. necatrix. A strong correlation (P < 0.05) of environmental conditions with the overall and species-wise prevalence of coccidiosis was recorded except E. necatrix.  相似文献   

Level and period of realimentation to assess improvement in body condition and carcass quality in cull ewes     

Randhir Singh Bhatt  Nira Manik Soren  Artabandhu Sahoo  Shaikh Abdul Karim 《Tropical animal health and production》2012,45(1):167-176

Improvement in body condition was assessed in 40 cull ewes (>6 years), equally distributed in two groups and realimented with ad libitum roughage (gram straw) and two levels of concentrate feeding, i.e., 2.5 % (T₁) of live weight (LW) and ad libitum (T₂). Five representative animals from an initial 45 were slaughtered at the initiation of the study (0 day) and five animals from each treatment at 44, 67, and 90 days of experiment for carcass attributes. Improvement in body condition score (BCS), nutrient utilization, feed efficiency, and carcass traits were assessed at 44, 67, and 90 days. Metabolism trial of 6-day collection of feed, feces, and urine samples was conducted on five representative ewes from each group after 60 days of feeding. The level of concentrate feeding on LW gain and BCS was significant, and the duration of realimentation showed a linear improvement (P?<?0.001). The digestibility and intake of dry matter, organic matter, and crude protein was higher (P?<?0.05) in T₂. The N intake, absorption, and balance showed a similar trend. Increase (P?<?0.05) in total N, trichloroacetic acid precipitable N, and ammonia N was observed with extension of realimentation period. Blood metabolic profile also showed improvement (P?<?0.05) from an undernourished state to normal after alimentation. Animals in T₂ accumulated higher LW with minimal expenditure of metabolizable energy (73.4 vs 79.1 MJ) and higher efficiency of feed conversion during 68 to 90 days of realimentation. Linear improvement (P?<?0.01) in carcass traits (preslaughter weight, empty live weight, hot carcass weight, dressing percentage, and amount of subcutaneous and intramuscular fat) and composition of longissimus dorsi muscle was observed. Ad lib concentrate supplementation for a period of 90 days may thus be considered appropriate for achieving desired efficiency of gain and improvement in body condition of cull ewes for quality mutton production.  相似文献   

Changes of plasma endothelin-1 and von Willebrand factor in patients undergoing cerebral digital substration angiography     

FU Mian  QIN Chao  CHENG Dao-bin  ZHAO Wei-jia  LIANG Zhi-jian  LIU Jing-li  LIANG Ming-hui  CHEN Xiang-ren 《园艺学报》2012,28(7):1323-1325

AIM: To investigate the effects of cerebral digital substration angiography (DSA) on the expression of endothelin-1(ET-1) and von Willebrand factor(vWF) in vascular endothelial cells from the patients with ischemic cerebrovascular disease. METHODS: The plasma levels of ET-1 and vWF were measured by enzyme-linked immunosorbent assay in 108 patients before, immediately and 24 h after cerebral DSA. RESULTS: The plasma level of endothelin-1 significantly increased immediately and 24 h after cerebral DSA as compared with that before the procedure (P<0.05). The level of vWF was not changed before and after operation. CONCLUSION: The marked and sustained increase in endothelin-1 plasma level after cerebral DSA is probably related to mechanical endothelial injury by the procedure of cerebral DSA.  相似文献   

Production, Economics, Employment Generation and Marketing Pattern of Rattan-Based Cottage Enterprises: A Case Study from an Urban Area of North-Eastern Bangladesh     

Md. Habibur Rahman  Most. Jannatul Fardusi  Bishwajit Roy  Md. Mostafa Kamal  Md. Jasim Uddin  Mohammed Abu Sayed Arfin Khan 《Small-Scale Forestry》2012,11(2):207-221

Rattan, an important non-timber forest product, is a flexible palm used in weaving baskets or furniture. Rattan is light yet sturdy, making it suitable for furniture that can be moved often. Bangladesh has a large number of rattan-based enterprises. This paper reports a case study carried out in Sylhet City Corporation of north-eastern Bangladesh, exploring the production, financial profitability and marketing of rattan-based products, and the problems and priorities of rattan-based enterprises as well as their potential contribution to employment opportunity. A sample survey was conducted of 58 randomly selected rattan-based enterprises with entrepreneurs personally interviewed using a semi-structured questionnaire. Based on the total investment, the enterprises were divided into large, medium and small categories. Three origins of rattan (Local, Myanmar and Indonesia) and five species were used by the enterprises to produce 29 rattan-based product types. Rattan products were divided into three basic categories, viz. domestic utensils, domestic decorative articles and others for which uses are not specific. Among the three rattan origins, processing cost of local and Myanmar rattan species products was less and more articles were sold than for Indonesia rattan species. Financial analysis indicated that rattan-based enterprises are a profitable and attractive option for local socio-economic development. Entrepreneurs’ views on major problems and issues in rattan-based product trading and suggested measures to improve the condition of rattan-based enterprises also collected. Rattan-based enterprises will generate more domestic revenue, foreign exchange and employment if policies are adopted to provide the enterprises with a reliable source of raw materials and technical and financial assistance from Government to NGOs to sell the products, and expand market facilities in both local and international markets.  相似文献   

Anti-diabetic potential of ursolic acid stearoyl glucoside: a new triterpenic gycosidic ester from Lantana camara     

Kazmi I  Rahman M  Afzal M  Gupta G  Saleem S  Afzal O  Shaharyar MA  Nautiyal U  Ahmed S  Anwar F 《Fitoterapia》2012,83(1):142-146

A new stearoyl glucoside of ursolic acid, urs-12-en-3β-ol-28-oic acid 3β-d-glucopyranosyl-4′-octadecanoate and other compounds were isolated from the leaves of Lantana camara L. The structure of this new glycoside was elucidated and established by standard spectroscopic methods. In streptozotocin-induced diabetic rats it showed significant reduction in blood glucose level.  相似文献   

Corrigendum to “Anti-diabetic potential of ursolic acid stearoyl glucoside: A new triterpenic gycosidic ester from Lantana camara” [Fitoterapia 83 (2012) 142–146]     

Imran Kazmi  Mahfoozur Rahman  Muhammad Afzal  Gaurav Gupta  Shakir Saleem  Obaid Afzal  Md. Adil Shaharyar  Ujjwal Nautiyal  Sayeed Ahmed  Firoz Anwar 《Fitoterapia》2012

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Distribution of acute phase proteins in the bovine forestomachs and abomasum   总被引：1，自引：0，他引：1  

Dilda F  Pisani LF  Rahman MM  Modina S  Tessaro I  Sartorelli P  Ceciliani F  Lecchi C 《Veterinary journal (London, England : 1997)》2012,192(1):101-105

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