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在新西兰为提高牧草产量,在春季和秋季施用氮肥是很重要的。而施肥一般都在放牧后的草地上,这时草地上有牲畜留下的尿斑,这些尿斑对不同形态氮肥氨挥发损失的影响如何,就是本文研究的目的。试验在新西兰坎特伯雷林肯学院的 Templeton 的粉砂壤土上进行。土壤0～1厘米层 pH6.1,有机碳为4.1%,全氮含量为0.33%,覆盖牧草是黑麦草与三叶草。试验时牧草剪留1厘米高,像羊吃过一样。试验布置24个微区,用封闭式气体采集器采集挥发的氨气,24个微区分为两组,一组施尿,一组不施
In New Zealand, it is important to apply nitrogen fertilizer in spring and autumn in order to increase pasture production. The fertilization is generally grazing grass, there are livestock left on the grass of the urinary spots, the variability of these forms of ammonia nitrogen ammonia volatilization loss of how, is the purpose of this study. Trials were carried out on the silt loam of Templeton, Lincoln College, Canterbury, New Zealand. Soil 0-1 cm layer pH6.1, organic carbon was 4.1%, total nitrogen content of 0.33%, covered with grass is ryegrass and clover. When testing the grass cut 1 cm tall, like the sheep eaten the same. Twenty-four micro-areas were arranged in the experiment. Ammonia vapor was collected by a closed gas collector. 24 micro-areas were divided into two groups. One group applied urine and one group did not apply