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放线菌结瘤植物(又称非豆科结瘤固氮植物)为多年生木本被子植物,约160多个种,分属7个科,15个属。在自然界氮循环中起着重要的作用。就其固氮量来说,它们和豆科植物大致相当,属同一数量级,如大豆平均年固氮量为103公斤/公顷·年,而欧洲.赤杨(Alnus glutinosa)为60公斤/公顷·年,高者达130公斤/公顷·年~([1])。然而在自然界中,不少地区放线菌结瘤植物的结瘤情况并不理想,如我国南方杨梅属就是如此,在研究以根瘤为对象的放线菌结瘤植物,特别是从国外或其它地区引种的植物,也首先需要研究如何使这些植物感染上根瘤内生菌。故此研究自然条件下的结瘤规律,有助于人工和自然接种,增加宿主植物的结瘤数量,从而不断增加生物的固氮量。多年来,国外对影响结瘤的单因子作了较为详细的研究,但在综合诸因子即自然条件下的结瘤,至今还未见到这方面的资料,为此,我们进行了结瘤季节动态的研究。
Actinomycetes plant nodulation (also known as non-legume nodulation plant) is a perennial woody angiosperms, about more than 160 species belonging to seven families, 15 genera. In the natural cycle of nitrogen plays an important role. Its amount of nitrogen fixation, they are roughly equivalent and legumes, it is of the same order of magnitude as the average annual soybean nitrogen fixation capacity of 103 kg / ha-year, while in Europe. Alder (Alnus glutinosa) of 60 kg / ha · years, The highest of 130 kg / ha · years ~ ([1]). However, in nature, nodulation of actinomycete nodulation plants in many areas is not ideal, as in Myrica rubra in southern China, in the study of actinomycetes nodulation plants nodules, especially from abroad or other Introduced plants also need to study how to make the first of these plants infected nodule endophyte. Therefore, the study of nodulation under natural conditions, contribute to artificial and natural inoculation, increase the number of host plants nodulation, thereby increasing biological nitrogen fixation. For many years abroad, the single factor affecting nodulation has been studied in more detail. However, to date, nodules under natural conditions have not yet been found yet. Therefore, Research.