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秸秆发电和气化残余物(下称草木灰),其含有丰富的大量和中微量元素,如K、Ca、P、Mg、Si、Cu、Zn、B等,其中钾含量尤为丰富。而水稻是一种喜钾和硅的作物。将草木灰作为钾肥应用于水稻的生产上,一方面可节约生产成本,另一方面还可以改善大米的品质;但草木灰同时还含有重金属元素,过量的施入势必会带来土壤环境的恶化,本文通过分析土壤中和大米中重金属含量的变化,得出本试验中草木灰的施入不会引起环境的恶化;从生产成本和水稻产量与品质上综合考虑得出处理木灰1 50%替代化学钾肥和草木灰2 75%替代化学钾肥是最佳施肥处理。
Straw power generation and gasification residue (hereinafter referred to as ash), which is rich in large and trace elements, such as K, Ca, P, Mg, Si, Cu, Zn, B and so on, of which potassium content is particularly rich. Rice is a hi-potassium and silicon crop. The application of ash as potash fertilizer on rice production can not only reduce the production cost, but also improve the quality of rice. However, ash also contains heavy metal elements. Excessive application will inevitably lead to the deterioration of soil environment. Through analyzing the change of heavy metal content in soil and rice, it was concluded that the application of ash could not cause environmental deterioration in this experiment. Based on the analysis of production cost and yield and quality of rice, Ash 2 75% alternative chemical potash fertilizer is the best treatment.