APPLICATION AND DEVELOPMENT OF ‘GREEN’ PREVENTIVE AND CONTROL TECHNOLOGIES IN GUIZHOU TEA PLANTATIONS

● Application of plant defense inducers against tea diseases. ● Application of natural enemies against insect pests. ● Application of Trifolium repens against weeds. The application and development of ‘green’ preventive technologies in tea plantations is an important means of ensuring tea quality and ecological safety. Ecological, agronomic and biological controls are the main preventive measures used in Guizhou Province. This paper summarizes the ‘green’ preventive technologies being applied in Guizhou tea plantations, including the use of plant defense inducers to regulate tea plant responses to pathogens, natural enemies to control pest species causing damage to shoots and Trifolium repens to control the main weed species. In addition, it summarizes the integrated ‘green’ preventive technologies being used in Guizhou and provides a foundation for the ecological maintenance of tea plantations.     

岷山红三叶改良亚高山草甸退化草地效果研究

研究了岷山红三叶对亚高山草甸退化草地的改良效果,结果表明:运用岷山红三叶改良退化的亚高山草甸草地,可抑制马先蒿等毒害草的生长,迅速提高天然草地的草丛高度,使地上植物量提高30%,可食植植量所占百分比显著增加,极大地改善了亚高山草甸草地的质量和生产能力,表明运用岷山红三叶改良亚高山退化草地技术具有推广应用价值。     

盐水浇灌下六个三叶草的耐盐性评价

试验以‘Redhybrid’,‘Salina’，‘86PK1280-007’，‘Ladino’，‘Orbit’”和‘08-2’等三叶草(Trifolium L.)为材料，设置三个不同EC(Electrical Conductivity)值处理(2.5，5.0，7.5dS·m^–1)，以营养液作为对照(EC=1.2dS·m^-1)，通过研究盐水浇灌对三叶草生长，光合效率和叶绿素荧光等指标的影响，以期为三叶草耐盐性评价、耐盐品种选育及其机理研究提供理论基础。结果表明，随着EC值的增加，三叶草的GI，PH，LA，FW，SPAD，PI，Fv/Fo，Pn，Tr和WUE均是先升后降的趋势，NB，DW，DR，Ci和Gs是逐渐降低的趋势。其中，GI，PH，LA，FW，SPAD，Pn和Tr的值均是在EC2.5时最高，PI，Fv/Fo和WUE的值则是在EC5.0时最高。主成分分析表明，DR，LA，SPAD，WUE和Ci可作为三叶草的耐盐性鉴定的关键指标。隶属函数值表明，六个材料的耐盐性顺序为：Ladino>08-2>86PK1280-007>Redhybrid>Orbit>Salina。