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| 滇池流域集约化菜田NO与NO2排放的研究 | |
| 引用本文： | 卢昌艾,胡万里,孔令明,夏体渊,段宗颜.滇池流域集约化菜田NO与NO2排放的研究[J].植物营养与肥料学报,2008,14(5):900-906. |
| 作者姓名： | 卢昌艾 胡万里 孔令明 夏体渊 段宗颜 |
| 作者单位： | 1.中国农业科学院农业资源与农业区划研究所、农业部植物营养与养分循环重点实验室,北京 100081; |
| 摘 要： | 采用密闭通气气室法，在滇池流域旱季和雨季开展了2个生长周期内集约化西芹地NO/NO2排放研究。结果表明， NO/NO2排放速率的日变化规律受温度的影响较为明显，中午时段最高，凌晨时段最低。西芹生育期间，CK处理（裸地）的NO/NO2排放速率维持在一定水平，中后期NF处理（不施氮）NO/NO2排放速率有所升高；LF（N 450 kg/hm2）和HF（N 1200 kg/hm2）处理受西芹的生长和频繁氮肥追施的影响，生育期NO/NO2排放速率逐渐升高。旱季与雨季CK处理NO/NO2排放量分别为1.30和NOx-N 1.51 kg/hm2，NF处理分别较CK高出NOx-N 1.0和1.44 kg/hm2。LF处理旱季与雨季NO/NO2排放量分别为NOx-N 4.88和5.67 kg/hm2，其损失率分别为0.79%和0.92%；HF处理旱季和雨季NO/NO2排放量分别为NOx-N 7.58和10.19 kg/hm2，其损失率分别为0.63%和0.85%，说明氮肥用量较高时，土壤—作物系统的NOx-N损失量也较高，但其损失率并不随施氮量的升高而升高。 |
| 关 键 词： | 滇池流域 集约化菜田 NO与NO2排放速率 NOx-N损失率 |
| 收稿时间： | 2007-9-18 |
NO and NO2 emissions from intensive vegetable field of Dianchi watershed |
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| LU Chang-ai,HU Wan-li,KONG Ling-ming,XIA Ti-yuan,DUAN Zong-yan.NO and NO2 emissions from intensive vegetable field of Dianchi watershed[J].Plant Nutrition and Fertilizer Science,2008,14(5):900-906. | |
| Authors: | LU Chang-ai HU Wan-li KONG Ling-ming XIA Ti-yuan DUAN Zong-yan |
| Institution: | 1.Institute of Agricultural Resources and Regional Planning,Key Laboratory of Plant Nutrition and Nutrient Cycling; CAAS,Beijing 100081,China; 2 Institute of Agricultural Environment and Resource,Yunnan Academy of Agricultural Sciences,Kunming 650205,China; |
| Abstract: | Enclosure growth chamber method, which removes the air inlet NO/NO2 first and then monitors NO/NO2 flux of enclosed growth chamber, was used to collect and determine in situ NO/NO2 emission from intensive vegetable field in Dianchi watershed in both dry and rainy seasons. The following results were obtained: 1) The NO/NO2 flux varied diurnally along with the soil temperature, its maximum appeared at noon, and its minimum appeared before dawn; 2) In the celery growth stage, the NO/NO2 flux of CK treatment(bare land) maintained at a certain level; the NO/NO2 flux of NF treatment (N 0 kg/ha) was higher than CK treatment in the mid and late period of celery growth; the NO/NO2 fluxes of LF (N 450 kg/ha) and HF (N 1200 kg/ha) treatments increased gradually because of the celery's growth and frequent N fertilizer application; 3) In dry and rainy seasons, the NO/NO2 emission of CK treatment in the growth stage was NOx-N 1.30 and 1.51kg/ha, respectively, and the NO/NO2 emission of NF treatment in the growth stage was NOx-N 1.07 and 1.44 kg/ha higher than that of CK, respectively; 4) In dry and rainy seasons, the NO/NO2 emission of LF treatment in the growth stage were NOx-N 4.88 and 5.67 kg/ha, which accounted for about 0.79% and 0.92% of applied fertilizer N, respectively; the NO/NO2 emission of HF treatment in the growth stage was NOx-N 7.58 and 10.19 kg/ha, which accounted for about 0.63% and 0.85% of applied fertilizer N, respectively. The NO/NO2-N emission in the growth stage increased with nitrogen fertilizer application rate, but its loss rate does not increase accordingly. |
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