高等植物在无机养分的吸收、利用方面,无论在种间或种内都存在差异。了解水稻吸收、利用氮素的生理过程,分析与高效地吸收,利用氮素有关的生理性状,用它们作为选种、育种的标准,可为经济地利用化学肥料,促使水稻最大限度地吸收土壤里可给态氮提供一种新手段。近年来,这已引起水稻生理及选种、育种工作者的注意。我们也做了一些初步工作,现简介如下: 供试品种为莲扩早、广陆矮4号。置一周苗龄的秧苗于1毫克分子以下不同浓度的(NH_4)_2SO_4中吸收铵离子,其吸收速率[微克分子/克(根鲜重)·小 Higher plants in the absorption of inorganic nutrients, the use of, regardless of species or species within the differences. Understand the physiological processes of rice absorption and utilization of nitrogen and analyze the physiological traits associated with efficient absorption and utilization of nitrogen and use them as a standard for selection and breeding so as to economically utilize chemical fertilizers and promote rice to absorb soil to the maximum extent In the nitrogen can provide a new means. In recent years, this has caused the attention of rice physiology and selection and breeding workers. We also did some preliminary work. Now we have a brief introduction as follows: The varieties for testing are Lianxianzao and Guangluzai4. Seedlings of young seedling at one week absorbed ammonium ions in different concentrations of (NH 4) 2 SO 4 below 1 mmol, the rate of absorption [micrograms per gram (root fresh weight) · small