LOSSES AND TRANSFORMATION OF NITROGEN DURING COMPOSTING OF POULTRY MANURE WITH DIFFERENT AMENDMENTS - AN INCUBATION EXPERIMENT

被引:179
作者
MAHIMAIRAJA, S [1 ]
BOLAN, NS [1 ]
HEDLEY, MJ [1 ]
MACGREGOR, AN [1 ]
机构
[1] MASSEY UNIV, DEPT SOIL SCI, FERTILIZER & LIME RES CTR, PALMERSTON NORTH, NEW ZEALAND
关键词
AMMONIA VOLATILIZATION; AMMONIFICATION; COMPOSTING; ELEMENTAL SULFUR; IMMOBILIZATION; POULTRY MANURE; ZEOLITE;
D O I
10.1016/0960-8524(94)90190-2
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The transformation of nitrogen (N) and its subsequent loss during aerobic and anaerobic composting of poultry manure with different amendments were investigated through laboratory incubation experiments. The amendments include& four carbon (C) rich bedding materials (woodchip, paper waste, cereal straw and peat), one acidifying material (elemental sulphur, S0) and two adsorbents (zeolite and soil). The loss of N through ammonia (NH3) volatilization from aerobic condition was about 17% of total manure N which was reduced by 90-95% under anaerobic condition. Under aerobic incubation systems, amongst the bedding materials examined, wheat straw and peat were found to be superior in reducing the NH3 loss by 33.5 and 25.8%, respectively. Loss of NH3 was reduced by 60% in manure amended with S0. Zeolite was a more effective NH3 (or NH4+) adsorbent than soil and reduced NH3 loss by 60%. The amount of 2 M KCl extractable NH4+-N was almost 1000 times higher than that of nitrate (NO3--N) in all composting mixtures suggesting little oxidation of NH4+ to NO3- (nitrification) occurred. The measurement of total N in the compost at the end of the experiment showed a total loss of about 50 and 26% of manure N during aerobic and anaerobic incubations, respectively, as against only about 17 and < 1% losses measured through NH3 volatilization. This suggested that the N loss through denitrification could be considerably higher than that occurred through NH3 volatilization.
引用
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页码:265 / 273
页数:9
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