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以2种作物,12个质地、有机质、全氮及碳氮比不同的土壤进行的盆栽和培养试验表明,利用土壤氮素矿化势计算得出作物生长期间的矿化氮量与作物吸收氮量有密切关系,且两者间有稳定比值。根据土壤氮素矿化势计算作物生长期间可利用的氮素有较为合理的依据,值得重视。用KCl煮沸法所浸取的氮素与短期培养所矿化的氮素是高度正相关,且回归系数接近1,说明二者在表示土壤供氮能力方面有同样价值。
Pot and cultivation experiments conducted on soils with two types of crops, twelve soils, organic matter, total nitrogen and carbon to nitrogen ratio showed that the amount of mineralized nitrogen and crop uptake of nitrogen during crop growth were calculated using soil nitrogen mineralization potential The amount is closely related, and there is a stable ratio between the two. It is worth to pay more attention to calculate available nitrogen during crop growth based on soil nitrogen mineralization potential. The nitrogen leached by KCl boiling method was highly positively correlated with the mineralized nitrogen in the short-term culture, and the regression coefficient was close to 1, indicating that both of them had the same value in representing soil nitrogen supply capacity.