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| Mineralization Characteristics of Organic Manure Nitrogen in Protected Vegetable Fields using In-situ Micro-lysimeter |
| REN Shan-lu1，ZHANG Yan-cai2，ZHAI Cai-xia2，CHEN Li-li2，LI Ruo-nan2，WANG Li-ying1，2*，CHEN Qing1 |
| 1College of Resource and Environment Sciences，China Agricultural University，Beijing 100193，China|2Institute of Agriculture Resource and Environment，Hebei Academy of Agricultural and Forestry Sciences，Shijiazhuang 050051，Hebei，China |
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Abstract Using In-situ method of micro-lysimeter the characteristics of manure N mineralization was investigated with different rate of chicken manure，straw mixed with chicken manure，compost with/without crop planting at incubation prophase．The results showed that there were obvious differences in the N mineralization amount and mineralization coefficient among different treatments．Before planting crops，the N mineralization coefficient ranged from -1.17% to 2.67%．The amount of leached N，mineralized N amount and N mineralization coefficient in high rate of chicken manure treatment was significantly higher than those in the treatments of different compost product．Crop planting significantly stimulated N mineralization．Its mineralization coefficient was 3.45% to 53.22%．The N mineralization amount increased with the increase of chicken manure amount in chicken manure treatment．The mineralized N in high rate of chicken manure treatment was significantly higher than those of chicken manure mixed with straw treatment，low rate of chicken manure treatment，and compost treatment．The coefficient of manure N mineralization in the treatment with high rate of chicken manure after planting crop was 50.55 percentage point higher．
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Received: 13 June 2012
Published: 26 July 2012
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