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锌肥在农业上的研究与施用,已引起广泛的重视。日本、菲律宾、美国等国都有缺锌的报导。日本、菲律宾等国认为在氯化钠盐渍土及滨海围垦的稻田中,施用锌肥是有效的水稻增产措施。美国利用~65Zn试验指出,当土壤pH值超过8时,不论是在嫌气与好气条件下,水稻植株中锌的含量明显下降。我国台湾、河北及福建等沿海盐渍土区也有水稻缺锌的报导。我们从1975年起在辽宁锦县、盘山等地结合盐渍土种稻改良,曾进行水稻施锌的田间试验,经过室内分析测定,可以初步看出在调查地区土壤有效态锌的含量是比较低的,现将分析结果连同以往的田间试验资料,简要归纳如下。 土壤有效锌的测定按我所技术室操作规程用0.05M EDTA浸提,植株用硝酸—过氯酸混合消煮,用原子吸收光谱测定。
Zinc fertilizer in agriculture research and application, has aroused widespread attention. Japan, the Philippines, the United States and other countries have zinc deficiency reports. Japan, the Philippines and other countries think that the application of zinc fertilizer is an effective rice stimulation in the saline-saline soil and coastal reclamation paddy fields. The United States using ~ 65Zn test pointed out that when the soil pH value exceeds 8, both in the anomaly and aerobic conditions, the content of zinc in rice plants decreased significantly. Coastal saline soil in Taiwan, Hebei and Fujian also reported zinc deficiency in rice. Since 1975, we have improved the combination of saline soils in Jinxian, Panshan and other places in Liaoning Province. We conducted field experiments on zinc fertilization in rice. After laboratory analysis, we can initially find that the content of soil available zinc in the surveyed areas is relatively Low, now the analysis results together with the previous field test data, summarized as follows. Determination of soil available zinc according to my room operating procedures with 0.05M EDTA leaching, plants with nitric acid - perchloric acid mixed digestion, with atomic absorption spectrometry.