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为查明氢醌对土壤中尿素氮系列的影响及其条件,在实验室条件下,取白浆土和冲积性砂壤土0—20cm的耕作土壤为试样,进行了氢醌对土壤脲酶活性动态,土壤硝化作用强度,土壤脲酶活性动态,土壤尿素氨挥发的影响实验,结果表明:(1)氢醌对土壤脲酶活性、尿素氨挥发和硝化强度的抑制率,同土壤脲酶活性大小和培养时间成负相关,同氢醌浓度成正相关;(2)砂壤土中比粘壤土中尿素分解速度快,氨挥发强度大,硝化速率快;(3)在麦秸还田土壤中,脲酶活性增高,尿素分解速率加快,从而降低了氢醌的抑制效应。同时,由于麦秸的“氮因子效应”而弥补了氢醌失效后可能造成的氮素损失。
In order to find out the effect of hydroquinone on the urea nitrogen in soil and its conditions, under the laboratory conditions, taking 0-20 cm tillage soil of albic soil and alluvial sandy loam as test samples, hydroquinone was applied to soil urease activity (1) Effects of hydroquinone on soil urease activity, ammonia volatilization and nitrification inhibition rate, soil urease activity, soil urease activity and soil urease activity, soil urease activity and soil ammonia volatilization were studied. Time was negatively correlated with the concentration of hydroquinone. (2) The urea decomposition rate was faster in sandy loam than that in clay loam, and the ammonia volatilization intensity was high and the nitrification rate was fast. (3) Urease activity increased in wheat straw returning soil, Urea decomposition rate accelerated, thereby reducing the inhibitory effect of hydroquinone. At the same time, nitrogen losses due to the hydroquinone failure were made up due to the “nitrogen factor effect” of wheat straw.