鸡粪中的有机酸及其对土壤速效养分的影响

通过室内模拟实验研究了鸡粪堆腐过程中有机酸的种类、含量和变化规律。结果表明 ,鸡粪腐熟过程中会形成和累积大量的有机酸 ,在堆腐的第 5周 ,最高含量可达88 3cmolkg- 1DM ;不挥发性有机酸在堆腐的第 3周和第 5周分别达到两个高峰 ,挥发性有机酸在第 6周和第 9周分别达到高峰 ,堆腐 9周后 ,鸡粪中的有机酸大大降低。鸡粪在堆腐的过程中产生大量的丁二酸及其衍生物等低级脂肪酸等。土培试验表明 ,这些酸在活化土壤磷素方面具有不可忽视的作用

ORGANIC ACIDS IN CHICKEN FECES AND THEIR EFFECTS ON AVAILABILITY OF NUTRIENTS IN LOESS SOIL

Kinds and contents of organic acids in the compost of chicken feces and their changes were studied. The results indicated that a lot of organic acids came into being and accumulated; the content of organic acids was 88.3 cmol kg -1 DM reaching the peak after 5 weeks of composting; the content of non-volatile organic acids had two peaks at the third and fifth week of composting separately; the peaks of the volatile acids occurred at the sixth week and ninth week separately. After 9 weeks of composting, the content and number of the kinds of organic acids declined sharply, apart from aromatic acids such as benzoic acid, benzenedicarboxylic acid etc ., and their ramification. There were many small molecular organic acids such as butane diacid and their derivatives and some big molecular fatty acids coming into being.