论文部分内容阅读
关于广东土壤的含钾状况和钾肥肥效,在水稻土方面已有较详尽的报道。本省仍有红壤、赤红壤和砖红壤等共约二亿余亩,是农、林、牧及经济作物的重要基地,但除李庆逵等曾分析研究广东一些土壤的钾素状况外,有关广东自然土壤钾素研究的资料较少。根据在海南岛及粤西砖红壤地区的肥料试验表明,花生、大豆、剑麻、番薯等对钾肥都有极明显的反应,在玄武岩台地上的砖红壤,林木明显表现缺钾。因此,进一步研究我省自然土壤的钾素状况及其有效性很有必要。本文就是初步研究广东几种主要土壤各种形态钾素的含量、钾素在土壤各粒级中的分布,不同
With regard to the potassium content of soil in Guangdong and the effectiveness of potash fertilizer, there have been more detailed reports on paddy soils. There are still more than 200 million mu of red soil, red soil and brick red soil in the province. It is an important base for farming, forestry and animal husbandry as well as cash crops. However, apart from the analysis of the potassium status of some soils in Guangdong by Li Qingtao et al. Soil potassium research data. According to fertilizer tests in Hainan Island and western Guangdong red soil region, peanut, soybean, sisal, sweet potato and other pots have a very obvious response to potash fertilizer. In the brick red soil on the basaltic terraces, the forest obviously shows potassium deficiency. Therefore, it is necessary to further study the status of potassium in natural soils of our province and its effectiveness. This article is a preliminary study of Guangdong in several major forms of soil potassium content, potassium in soil particle size distribution, different