| Effect of matching use of straw and fertilizer on the dynamic changes of soil dehydrogenase and polyphenoloxidase activities |
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| DOI：10.7606/j.issn.1000-7601.2009.04.28 |
| Key Words: straws dehydrogenase polyphenoloxidase dynamic changes |
| Author Name | Affiliation | | CHEN Qianglong | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | GU Jie | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Yangling, Shaanxi 712100, China | | GAO Hua | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Yangling, Shaanxi 712100, China | | QIN Qingjun | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Yangling, Shaanxi 712100, China | | ZHEN Lisha | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | CHEH Shengnan | College of Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China | | SUN Lining | College of Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Soil enzyme activities play an important role in the material cycle and energy flow of ecosystem. The objective of this field experiment was to determine the effect of the use of organic and chemical fertilizers on the dynamic changes of soil dehydrogenase and polyphenoloxidase activities in growth stages of winter wheat. The experiment included five fertilizer treatments: control (no fertilizer); returning corn straw to field; returning corn straw to field combining application of manure; returning corn straw to field combining application of nitrogen fertilizer (pure N 210 kg/hm2); and returning corn straw to field combining application of nitrogen (pure N 210 kg/hm2) and phosphate fertilizers (P2O5 150 kg/hm2). Each treatment was replicated four times. The results showed that the fluctuation of the trend of dynamic changes of soil dehydro genase activity was much stronger than that of polyphenoloxidase activity. Manure application and returning corn straw to field could increase significantly the dehydrogenase activity. In the late growth stage of winter wheat, nitrogen fertilizer application could increase significantly the dehydrogenase activity, but the increasing action was weakened by the input of phosphate fertilizer. The effect of phosphate fertilizer application and returning corn straw to field on the soil polyphenoloxidase activity did not reach the significant level. In the middle growth stage of winter wheat, manure and nitrogen fertilizer application could restrain the polyphenoloxidase activity in this experiment. But in late stages, especially in April and May, the restraining action became weaker. |
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