摘要
本文研究了江苏里下河地区低湿地土壤上发育的水稻土铁还原酶活性特征与氧化铁的形态、铁的活化及水稻土的发育度之间的关系。结果表明,所有供试土壤剖面的耕层的铁还原酶活性都较高,不同发育度的水稻土具有不同的剖面分布规律。脱潜型水稻土剖面上下层铗还原酶活性均较高,且有随深度增加而上升的趋势,而脱潜潴育型水稻土则随深度而下降。铁还原酶活性是与土壤通气、透水、氧化还原状况、氧化铁活化度、有机质含量等理化性状有密切关系的综合性生物学参数。它在一定程度上能反映低湿地水稻土的发育度。此外,本文还对铁还原酶活性的测定方法作了探索,尝试性地提出了自然铁还原酶活性的概念。自然铁还原酶活性的测定,简便易行,洲定时条件较为接近田间实际状况。
A study was carried out on the relationship between characteristics of ferricreductase and various forms of iron oxides, activation of iron oxide of paddy soils derived from the wetland in Li-Xia-He river region of Jiangsu Province. An investigation on the measuring method of ferric-reductase was also conducted and the concepts of both ferric-reductase activity (K_1) and natural ferric-reductase activity (K_2) were tentatively put forward. The results indicated that K_1 and K_2 for the cultivated horizons of all soil profiles tested were more than 320 mg Fe_2O_3/100g, 48h. and 100mg Fe_2O_3/100g.48h, respectively. K_1 in the whole profile of deleyed paddy soil was higher and tended to increase with the increasing of depth. But it decreased gradually for degleyed hydrogenic paddy soils.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1989年第1期77-82,共6页
Journal of Nanjing Agricultural University
基金
国家自然科学基金
关键词
湿地
水稻
土壤
铁还原酶
铁
活化
Wetland
Paddy soil
Ferric-reductase
Activation of iron oxide
