冷季型草坪草建植管理技术研究     

邓蓉  向清华  梁应林 《草业科学》2001,18(6):70-74

采用正交设计进行施肥里、刈割高度、播量，草坪草品种4因素4水平试验，通过测定草坪草越冬率，越夏率，成坪时间，叶绿素，杂草盖度，生长度，初步筛选出不同目的冷季型草坪草的建植管理方案。  相似文献   

农业科研立题和成果鉴定的情报查新     

周带娣  方育群 《湖南农业大学学报(自然科学版)》1992,(2)

阐述了农业科研立题,成果鉴定的情报查新的必然性及重要意义,并对查新工作提出了几点建议。  相似文献   

四川乐山地区紫茎泽兰的入侵定殖和风险评估   总被引：4，自引：0，他引：4  

易建平  印丽萍  李大春  李风婷  叶军 《植物检疫》2003,17(6):333-336

本文报道了四川省乐山地区犍为县塘坝乡境内入侵新物种一紫茎泽兰的分布、发生和定殖入侵情况。结合紫茎泽兰的生物学特性和当地的地理气候特征，对紫茎泽兰入侵乐山及其近邻地区的风险进行评估。  相似文献   

地被石竹嫩枝扦插快速生根的研究     

姚澍晖  杨永明 《中国草地学报》2003,25(4):79

地被石竹嫩枝扦插快速生根的研究表明:选用成熟度较高的地被石竹带顶芽茎段浸醮200mg/LIBA+5mg/L间苯三酚溶液后,扦插于蛭石:河沙为2∶1的基质上,在地温20℃、气温25℃、相对湿度90%的条件下培养,6d后形成完整的根,生根成活率可达93.8%,培育60d后可用于建植观赏草坪。  相似文献   

夏季狗牙根草坪不同建植方法及秋季交播黑麦草对成坪效果的影响   总被引：1，自引：2，他引：1  

王文恩  张俊卫  傅强  包满珠 《草业科学》2005,22(3):94-97

以狗牙根Cynodon dactylon种子和营养体为材料，在武汉地区，对5种不同建植方法建成的草坪从盖度变化、成坪时间、均一性、建植成本及秋季交播多年生黑麦草Lolium perenne后翌年狗牙根的草坪质量等方面进行综合比较。结果表明：采用夏季建植狗牙根草坪并于秋季交播多年生黑麦草的方法来建植四季常绿草坪，狗牙根采用撒茎覆沙法效果最佳，其他方法依次为开沟埋茎法、闻铺草皮法、穴植草茎法；种子直播法在翌年需重新建坪。  相似文献   

高速公路边坡防护体系的建植养护   总被引：1，自引：0，他引：1  

田宏  陈海平 《草业科学》2005,22(8):76-78

在对广东省普惠高速公路边坡生物防治体系——护坡草皮的建植和养护过程中，就草种选择、建植方式和质量监控等问题进行了讨论并提出建议，旨在提高我国高速公路边坡防护体系草皮的建植和养护水平。  相似文献   

Influences of population density,temperature and latitude on the growth of invasive topmouth gudgeon Pseudorasbora parva          下载免费PDF全文

Gareth D. Davies  J. Robert Britton 《Ecology of Freshwater Fish》2015,24(1):91-98

Plasticity in life‐history traits provides advantages for introduced fish in overcoming demographic bottlenecks that would otherwise inhibit establishment. Here, the influence of population density, temperature and latitude was tested on the growth increments and growth rates of invasive populations of topmouth gudgeon Pseudorasbora parva, a small Asian cyprinid fish that is invasive across Europe. Aquaria experiments tested the roles of fish number and temperature on growth increments under a fixed food supply, pond experiments tested the role of density on growth increments, and a field study completed in England and Wales tested the influence of density and latitude on growth rates. In aquaria experiments, whilst growth increments were higher at 21 and 23 °C than at 19 and 25 °C, fish number had a greater influence on growth than temperature. Higher growth increments were produced at lower densities. In experimental ponds, growth increments were significantly higher in ponds with low densities of P. parva compared with those at elevated densities. In the field study comprising 10 wild populations across a latitudinal gradient of 4.0°N, a difference in mean air temperatures of approximately 3 °C, and estimated densities between 0.5 and 65.0 m^?2, population density was the only significant predictor of growth rates. Whilst populations at very low densities comprised of significantly faster growing individuals, there were no significant differences when densities were between 15 and 65 m^?2. Thus, invasive P. parva populations have considerable growth plasticity, especially at low densities, with this likely to be important in their ability to colonise new environments.  相似文献   

我国农机标准化建设发展探析     

牟楠 《农业机械化与电气化》2014,(1):79-80

为促进我国农机事业快速、健康发展，论述全面推进农机标准化建设的背景及条件，探讨加快农机标准化建设对我国农业发展的重要现实意义，总结我国农机标准化建设中存在的主要问题，并提出切实可行的发展措施。  相似文献   

Establishment and Application of Nested RT-PCR Assay for Detection of Classical Swine Fever Virus     

LIU Mei-fen  WANG Shu-juan  YAN Ruo-qian  WANG Dong-fang  CAO Wei-wei  ZHAO Xue-li  LI Qin-nan  LI Ning 《中国畜牧兽医》2016,43(9):2285-2290

  相似文献   

Automatic Generation of Curvilinear Grid for Finite Difference Method with Many Inner Objects     

GAN Zi 《保鲜与加工》2001,(5):110-114

In this paper the partial differential equation of coordinate transformation is computed by the finite difference formulations and some examples were computed and illustrated in pictures.  相似文献