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| 春秋季红壤旱地氨挥发对氮施用量、气象因子的响应 | |
| 引用本文： | 周静,崔键,王国强,何圆球,马友华. 春秋季红壤旱地氨挥发对氮施用量、气象因子的响应[J]. 土壤学报, 2007, 44(3): 499-507 |
| 作者姓名： | 周静 崔键 王国强 何圆球 马友华 |
| 作者单位： | 1. 南京农业大学资源与环境科学学院,南京,210095;中国科学院南京土壤研究所,南京,210008 2. 安徽农业大学研究生院,合肥,230036;中国科学院南京土壤研究所,南京,210008 3. 南京农业大学资源与环境科学学院,南京,210095 4. 中国科学院南京土壤研究所,南京,210008 5. 安徽农业大学研究生院,合肥,230036 |
| 基金项目： | 国家自然科学基金;中国科学院知识创新工程项目 |
| 摘 要： | 通过红壤旱地种植牧草马唐和蔬菜冬萝卜轮作试验,研究了在春秋二季红壤旱地氨挥发对不同施氮量和气象因子的响应。结果表明,红壤旱地春季牧草实验,氮肥处理N90、N160和N230,氨挥发持续10~17d,在施肥后6~8d达到峰值,峰值(扣除对照N0)分别为N0.11、0.57和1.84kghm-2d-1。秋季氮肥处理N70、N130、N190和N250以基肥和以水带肥追施(基/追比为7∶3)氨挥发持续时间均为10~11d,基肥氨挥发峰值(扣除对照N0)分别为N0.02、0.05、0.06kghm-2d-1和0.09kghm-2d-1;追肥氨挥发峰值(扣除对照N0)分别为N0.05、0.22、0.38kghm-2d-1和0.72kghm-2d-1。不同施氮处理,春季累计氨挥发量为N0.67~5.16kghm-2,占施入肥料N的0.74%~2.24%;秋季累计氨挥发量为N0.37~3.04kghm-2,占施入肥料N的1.31%~3.69%。红壤旱地春秋二季氨挥发量(y)均随施N量(x)的提高而指数递增,其关系式分别为:y=0.1576e0.0146x和y=0.1826e0.0112x。显著性检验表明,春秋两季不同施氮量处理之间,土壤氨挥发量及挥发通量差异均达到显著水平。春秋二季基肥氨挥发总量和通量均与气温、气压、蒸发量和土温等环境气象因子有较好的相关性(p<0.05)。 |
| 关 键 词： | 红壤 施氮量 气象因子 氨挥发 |
| 收稿时间： | 2006-01-26 |
| 修稿时间： | 2006-01-262006-06-11 |
AMMONIA VOLATILIZATION IN RELATION TO N APPLICATION RATE AND CLIMATE FACTORS IN UPLAND RED SOIL IN SPRING AND AUTUMN |
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| Zhou Jing,Cui Jian,Wang Guoqiang,He Yuanqiu and Ma Youhua. AMMONIA VOLATILIZATION IN RELATION TO N APPLICATION RATE AND CLIMATE FACTORS IN UPLAND RED SOIL IN SPRING AND AUTUMN[J]. Acta Pedologica Sinica, 2007, 44(3): 499-507 | |
| Authors: | Zhou Jing Cui Jian Wang Guoqiang He Yuanqiu Ma Youhua |
| Affiliation: | 1.College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China;2.College of Graduate Student, Anhui Agricultural University, Hefei 230036, China;3.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
| Abstract: | Ammonia volatilization in relation to N application rate and climate factors was studies through field experiment in red soil under the crop rotat ion of Smooth Crabgrass (Digitaria ischaemum) in spring and Winter Radish (Raphanus sativus) in autumn.Results indicate that ammonia volatilization in Treatments N90, N160 and N230 in spring dragged on for 10~17 days, and peaked at the 6th~8th day after urea application, reaching N 0.11, 0.57 and 1.84 kg hm-2d-1, respectively, and the total amount of N loss through ammonia volatilization was N 0.67~5.16 kg hm-2, accounting for 0.74%~2.24% of the total N applied In autumn, in Treatments N70, N130, N190 and N250 (the ratio of basal and sidedressing is 7.3) ammonia volat ilization occurred both after application of basal fertilizer and tillering fertilizer and lasted 10~11 days, with peaks reaching N 0.02, 0.05, 0.06 and 0.09 kg hm-2d-1 for the basal fertilizer, and N 0.05, 0.22, 0.38 and 0.72 kg hm-2d-1 for the tillering fer tilizer respect ively.The total amount of N loss through ammonia volatilization was N 0.37~3.04 kg hm-2, accounting for 1.31%~3.69% of the total N applied to Winter Radish (Raphanus sativus). |
| Keywords: | Red soil N rate Ammonia volatilization Climate factor |
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