COMPARISON OF FOUR METHODS OF MEASURING VOLATILIZATION LOSSES OF NITROGEN FOLLOWING UREA FERTILIZATION OF FOREST SOILS
COMPARISON OF FOUR METHODS OF MEASURING VOLATILIZATION LOSSES OF NITROGEN FOLLOWING UREA FERTILIZATION OF FOREST SOILS
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森林土壤尿素施肥后氮挥发损失的四种测定方法比较
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
D. Debell
中科院分区：
文献类型：
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作者：
V. G. Marshall;D. Debell
对温哥华岛森林土壤尿素（220 kg N/ha）施用后氨挥发损失的测量方法进行了比较：(i)闭式静态、（ii）半开放式、（iii） 15n平衡和（iv）闭式动态。前三种方法在现场使用；第四个在实验室。此外，采用方法ii、iii和iv评估了两种模拟降雨水平的影响。通过以下三种方法中的每一种方法测量的挥发性氨含量均显著高于静态封闭(13%)<半开放(17%)<动态封闭（22-26%）。15n平衡法测量了35-42%，但这些值不能与其他三种方法直接比较，因为它测量的是除氨以外的其他气体的损失。模拟的12 mm降雨显著降低了氨损失，但未改变半开式<闭式动态< 15n -平衡的关系，分别为9.12%和22%。由于估计氨损失(即总减…
Four methods were compared for measuring ammonia volatilization losses following urea application (220 kg N/ha) to a forest soil from Vancouver Island: (i) closed-static, (ii) semi-open, (iii) 15N-balance, and (iv) closed-dynamic. The first three methods were used in the field; the fourth in the laboratory. In addition, the effects of two levels of simulated rainfall were assessed with methods ii, iii and iv. Significantly greater amounts of volatile ammonia were measured by each of the following three methods in the order: closed-static (13%) < semi-open (17%) < closed-dynamic (22–26%). The 15N-balance method measured 35–42%, but these values could not be compared directly with the other three methods, because it measures losses from gases other than ammonia alone. The simulated 12-mm rainfall significantly decreased ammonia losses, but did not change the relationship among methods: semi-open < closed-dynamic < 15N-balance for 9, 12 and 22%, respectively. Since estimated ammonia losses (i.e. total minus ...