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[目的]探讨氯醋树脂型缓释氮肥的养分释放特征及对土壤矿质氮的影响。[方法]以氯醋树脂和羟基改性的氯醋树脂为新型包膜材料制备包膜缓释氮肥,用水浸泡法来评价氯醋树脂型缓释氮肥的养分释放特征和用盆栽试验法研究氯醋树脂型缓释氮肥对土壤矿质氮的影响。[结果]氯醋树脂缓释氮肥的释放期为60 d,羟基改性的氯醋树脂缓释氮肥为50 d,氯醋树脂和羟基改性的氯醋树脂缓释氮肥处理的土壤铵态氮含量在30 d时达到了最高峰,土壤硝态氮含量在60 d时达到了最高峰,氯醋树脂缓释氮肥处理的土壤硝态氮含量在120 d时出现一次上升。在小麦产量上,各处理间无显著差异,但在后期的水稻产量上,氯醋树脂缓释氮肥显著高于羟基改性氯醋树脂缓释氮肥处理(P<0.05)。[结论]盆栽试验法与水浸泡法评价缓释氮肥的释放天数是不同的,一季旱田作物并不能发挥缓释氮肥的肥效长的特点,需要做两季的水旱轮作,才能真正的发挥它的作用。
[Objective] The research aimed to discuss the nutrient release characteristics of chloride-vinegar resin type slow release nitrogen fertilizer and its influence on mineral nitrogen in soil. [Method] The coated slow-release nitrogen fertilizer was prepared by using the new type of coating material made of chloroacetic resin and hydroxyl-modified chloroacetic resin. The water release method was used to evaluate the nutrient release characteristics of the chlorine-vinegar resin slow release nitrogen fertilizer and the pot experiment was used to study the effect of chlorine Effect of Slow - release Nitrogen Fertilizer with Vinegar on Soil Mineral Nitrogen. [Result] The release period of slow-release nitrogen fertilizer for chloroacetic resin was 60 days. The slow-release nitrogen fertilizer for hydroxy-modified vinegar resin was 50 days. The contents of ammonium nitrogen The content reached the peak at 30 days. The content of nitrate nitrogen in soil reached the peak at 60 days. The content of nitrate nitrogen in soil treated with slow-release nitrogenous fertilizer increased once at 120 days. There was no significant difference in the yield of wheat between the treatments. However, in the late rice yield, the slow-release nitrogen fertilizer of chloroacetic resin was significantly higher than that of the slow-release nitrogen fertilizer of hydroxy-modified chloroacetate resin (P <0.05). [Conclusion] Pot experiment method and water immersion method were different in evaluating the release days of slow release nitrogen fertilizer. One season dry field crops did not play the role of slow-release nitrogen fertilizer. Role.