固体亚硫酸铵肥料在水稻土施用的研究——一种新型氮肥的开发利用

STUDY ON SOLID AMMONIUM SULPHITE FERTILIZER APPLIED TO THE RICE SOIL——THE EXPLORATION OF A NEW TYPE OF NITROGENOUS FERTILIZER

本文讨论固体亚硫酸铵肥料在水稻土施用的肥效、转化和对土壤氧化还原状况的影响。试验结果表明,只要施用量恰当,亚铵与硫铵有同等肥效。亚铵可以利用工业废气中的 SO_2生产,良化生态环境,变废为宝,开发利用很有意义。亚铵在渍水土壤施用,引入的 SO_3^(2-),多数在水层被氧化成 SO_4^(2-),对土壤还原性质影响不大;土层的"pe+pH"多数在5以上,不足以造成 SO_3^(2-)被还原成 H_2S^0或 S^(2-)而构成对水稻毒害。土壤水溶性亚铁离子约占亚铁离子总量的5%(约28ppm),低于对水稻毒害的临界浓度。亚铰肥料在水稻土合理施用是安全的,肥效良好。

The paper deals with the effect,transformation and influence of redox pro- perties on soil by solid ammonium sulphite fertilizr [(NH_4)_2SO_2.H_2O] to be applied to the rice soil. Result of the test has been made out,the ammonium sulphite and the ammo- nium sulphate fertilizers had equal fertilizer effect under suitable quantity of application. The ammonium sulphite can be made from so_2 of the industrial waste gas. It can improve ecological habitat.And so it is of great significance. If the ammonium sulphite was used in submerging soil,its SO_3^(2-)would be oxi- dated to SO_4^(2-) in horizon of water and used up.So its effect on reducing proper- ties of soil was very weak.Owing to 'pe+pH' of soil horizon was bigger than 5 in most cases,the SO_3^(2-) could not be reduced to H_2S^+ or S^(2-),so it didn't exert as a poison on rice.water-soluble ferrous iron of soil was about 5%(about 28 ppm) in the sum total of ferrous iron in soil,the concentration was smaller than critical concentration of poison on !rice. When the ammonium sulphite fertilizer is applied to rice soil rationally, it may he safe and effective.