论文部分内容阅读
有些盆花出室后不久,往往莫明其妙地死亡。尤其是一些喜温性的茉莉、米兰、牡丹、杜鹃等,抗病害较弱,死亡率更高。这主要是花卉在室内越冬时,感染的各种细菌、病毒等病原菌体,在外界气温、湿度上升后开始迅速繁殖,使花卉致病的缘故。盆花在室内经过漫长的冬季,而室内由于保温多通风不良,各种病原菌体较多。花卉出室后随着外界气温的不断上升,尤其是日平均气温稳定上升到15℃以上后,各种病原体便开始进入活跃期,并迅速大量繁殖增生。从而大量吸收茎叶中的营养液质,破坏嫩茎叶片的正常生理机能,堵塞叶片气孔,阻碍气体交换和光合作用、使整个植体或因长时间
Shortly after some potted plants, often inexplicably died. In particular, some warm-temperate jasmine, Milan, peony, rhododendron, etc., disease resistance is weak, higher mortality. This is mainly the flowers in the winter, the infection of various bacteria, viruses and other pathogenic bacteria in the outside world after the temperature and humidity began to multiply rapidly, so that the cause of the flower disease. Potted flowers in the room after a long winter, and indoor due to poor ventilation and ventilation, a variety of pathogenic bacteria more. After the flowers leave the room as the outside temperature continues to rise, especially the daily average temperature rose steadily above 15 ℃, various pathogens began to enter the active phase, and rapid mass proliferation. Thereby absorbing a large number of nutrients in the stems and leaves of the liquid, destroying the normal physiological function of young leaves, plug the leaves stomata, hinder the gas exchange and photosynthesis, the entire implant or due to prolonged