红豆草在旱农地区固氮肥田作用研究(Ⅰ)

本文研究了红豆草(Onobrychis Viciaeffolia Scop)在旱农地区的结瘤固氮作用。研究表明,在该地区红豆草结瘤状况良好,单株根瘤量多达1.9—3.0克,但多属无效根瘤。用乙炔还原法测定根瘤的固氮活性为0.048毫微克乙烯分子/毫克根瘤/分钟。此外,研究了红豆草结瘤固氮的环境因素(包括土壤有效养分、微量元素及水分、光照等)。研究认为,在该地区肥力较低的土壤,需要施用一定氢肥,这对提高红豆草的经济产量是重要的。

Studies on Nitrogen Fixation and Soil Fertilization of the Onobrychis Viciaeffolia Scop in Drought Agricultural Region(Ⅰ)

This paper researched nodule formating and nitrogen fixing of the Onobrychis Vicaeffolia stop in drought agricultural region.The results obtained demonstrated that nodule formating of this stop was very good.The weight of nodules went to 1.91—3.0 grams per strain,but most of the nodules became ineffective ones.The nitrogen fixation activity of nodules went to 0.048 mug Molar C_2H_4/mg nodule/min.By means of acetylene reduced method,the enviromental factors of soil (including effective nutrition,micro-elements and moisture in soil)and light intensity adt influenced nodule formating and nitrogen fixing obviously. Besides,the results of this research indicate that applying more nitrogen fertilizer into the soil in lower fertility region is necessary for gainning more yield.