The data on CO2 production and net mineralization showed that the C/N ratio of the degraded material was around 9 or below. It is much lower than the ratio of total carbon over total nitrogen in the soil. This indicates that microorganisms and compounds high in nitrogen were mineralized. ...
发明人: H Dessart 摘要: Process for the neutralization of a layer of acidic water over a sediment comprising a humic substance, according to which blocks of a sodium compound are made to fall through the water layer and to enter the sediment at least partially.收藏...
humus soil 美 英 na.腐植土 网络腐殖土;腐殖质土;腐殖质土壤 英汉 网络释义 na. 1. 腐植土
humus acid 美 英 un.腐殖酸 网络腐植酸;黑腐酸;黑腐酸或胡敏酸 英汉 网络释义 un. 1. 腐殖酸
E-maiI:hyxbe@263.net Flocculationprocessoffine-grainedsedimentsbythecombinedeffect ofsalinityandhumusintheChangjiangEstuary LUOizhen 1* ,LJiufa 1 ,DAZhijun 1 ,LDaoji 1 1.StateKeyLaboratoryofEstuarineandCoastaIResearch,EastChinaNormaIUniversity,Shanghai200062,China Received3May2006;accepted13November2006...
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As the pH went up, the net negative electric charge was produced. As the pH dropped, there was less and less negative charge (Figure 2). However, the negative charge of humus is generally believed to be due to the dissociation of Hþ from phenolic and carboxylic functional groups. All ...
The resulting net N mineralisation from slowly decomposable 'old humus' (per g of org. N) spanned an extremely wide range and was strongly influenced by former landuse (forest and grassland). Simulated N mineralisation using field temperature records fitted well to measured net mineralisation data...
The data reveal a continual N-immobilization, but at 20°C a substantial net re-mineralization took place during the last part of the experiment. The nitrate treatment was followed by a sizeable temporary net immobilization of tracer-N. The extremely great changes in the inorganic N 15 -pool ...
Correlations of net mineralizable N at 8 weeks with humus chemistry variables were weak, although initial N release was correlated with total N. Field-fertilized (urea) and control substrates from the three ecosystems were similarly incubated to observe effects of N addition on mineralization and ...