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通过设置在甘肃省定西市安定区李家堡镇麻子川村尼龙网袋埋土试验,研究玉米、小麦秸秆在10g、30g、50g、70g四个还田量水平(等碳量以小麦含碳量为基准)的腐解特征及其养分释放规律。结果表明:经过100天的腐解,玉米、小麦秸秆的腐解速率均呈现出前期快、后期慢的趋势,玉米秸秆腐解率大于小麦秸秆。就秸秆四个还田量水平来说,还田量为26.23g的玉米秸秆腐解最快,累积腐解率为64.15%,而玉米秸秆还田8.74g处理的腐解最慢。而小麦秸秆还田量为50g的腐解效果较好,10g还田量水平下的腐解率最小。因此,玉米秸秆26.23g或小麦秸秆50g还田的腐解效果较好。
By setting up the nylon net bag embedding test in Mazichuan Village, Lijiapu Town, Anding District, Dingxi City, Gansu Province, the four field levels of corn, wheat straw at 10g, 30g, 50g and 70g were studied. As the benchmark) decomposing characteristics and nutrient release law. The results showed that after 100 days of decomposition, the decomposition rate of corn and wheat straw showed the tendency of early and late slow, and the decomposition rate of corn straw was greater than that of wheat straw. For the four straw returning levels, corn stalks with a returnable quantity of 26.23g decomposed most rapidly, with a cumulative decomposing rate of 64.15%, while corn stalks returning 8.74g exhibited the slowest decomposition. However, the effect of 50g wheat straw returning was better, and the decomposing rate was the least under the 10g return level. Therefore, corn straw 26.23g or wheat straw 50g better response to the decomposing.