The batch-type airflow enclosure method was adopted to measure the ammonia volatilization (AV) from paddy field under different fertilization rates in irrigation area of the Yellow River .
采用密闭气室间歇式抽气法研究了黄河上游灌区不同施肥处理下稻田氨挥发损失特征。
Finally, the canal water efficiency of all levels of canals, canal system water efficiency and paddy field water consumptions of the 10 main irrigation areas in Shenyang city were put out.
最后分别计算出沈阳市以上十个主要灌区各级渠道的渠道水利用系数、渠系水利用系数和水田的耗水量。
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