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覆膜高肥较覆膜低肥处理显著地提高了花生土著根瘤茵菌数密度,前者每克土壤菌数达10~4—10~6个,而后者仅为10~2-10~4个.覆膜与裸地相比,前者显著提高了土壤根瘤菌的侵染结瘤能力和乙炔还原能力,单株累计根瘤数覆膜达到71个,根瘤干副68mg,而裸地处理相应仅分别为30个和36mg;此外覆膜处理还显著地促进了根瘤的生长发育和植株对土壤氮素的吸收力,在花生不同生育期,其单株含氮量均显著高于相应的裸地处理,这些构成了覆膜较裸地高产的生理基础.
The low fertilizer treatment with film-covered high-fertilizer and over-film significantly increased the number density of native rhizobia of peanut. The former had 10 ~ 4-10 ~ 6 bacteria per gram of soil, while the latter was only 10 ~ 2-10 ~ 4 Compared with bare land, the former significantly increased the nodulation ability and the ability of reducing acetylene of Rhizobium, the total number of root nodules per plant reached 71 and the root nodule was 68mg, while the bare land was treated only correspondingly 30 and 36 mg, respectively. In addition, the treatment of film mulching also significantly promoted the growth and development of nodules and the plant nitrogen uptake, and the nitrogen content per plant of peanut at different growth stages was significantly higher than that of corresponding bare land , These constitute the physiological basis of the high yield of plastic film.