摘要
采用开放式箱法和乙炔抑制技术,研究了大豆、春小麦和谷子3种植物不同生育期的N_2O释放速率以及施肥对春小麦N_2O释放速率的影响。研究发现,3种植物N_2O释放速率不同,但都具有在生长发育的前期阶段逐渐增加,至开花期前后达到高峰,然后又迅速下降的相似变化规律。在相应生育期,大豆表现出比谷子和春小麦更高的N_2O释放速率。不同的施肥量造成春小麦不同的生长状况,其N_2O释放速率也随之不同,过量施肥引起N_2O释放速率增加。
It is verified that plant is a new N_2O emission source. The N_2O emission rates of soybean, spring wheat and millet at different growing stages and that of spring wheat fertilized at several fertilization levels are measured by using open chamber method and C_2H_2 inhibitory technique. The results indicate that the N_2O emission rates of these three kinds of plants increase gradually in early growing stages and reach the maxmium before and after blooming stage, and then decrease sharply. Significant difference in N_2O emission rates among tested plants is found at the relative development stages. Of these plants, soybean shows the hightest N_2O emission rate. Under different fertilization conditions, both growing status and N_2O emission rate of spring wheat are different and the excess fertilization rasults in a higher N_2O emission rate.
出处
《应用生态学报》
CAS
CSCD
1993年第3期295-298,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金
国家攀登计划资助项目
关键词
施肥
植物
释放
一氧化二氮
N_2O emission rate of plant, Growing stage, Fertilization.
