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采用室内恒温培养法研究结果表明，玉米秸无论单施或与ＮＰ肥配施，前期（砂土５０天，粘土７０天）均不释出矿化氮。ＮＰ肥施用与否，对其矿化转折点没有明显影响。玉米秸施入土壤后，前期（５０天左右）能提高土壤有效磷水平。ＮＰ肥单施时，碱解氮的降速分别为砂土２．１５ｍｇ／ｋｇ．ｄ．粘土１．４３ｍｇ／ｋｇ·；有效磷降速分别为砂土０．５５ｍｇ／ｋｇ·ｄ．粘土１．２５ｍｇ／ｋｇ．ｄ。
The results of indoor thermostatic culture showed that no matter the application of corn stalks or NP fertilizers, the mineralized nitrogen was not released in the early stage (50 days of sand and 70 days of clay). NP fertilizer application or not, its mineralization turning point no significant impact. Corn stalks applied to the soil, the early (50 days or so) can increase soil available phosphorus levels. NP fertilizer single application, the rate of degradation of alkaline hydrolysis of sand 2.15mg / kg. d. Clay 1.43mg / kg ·; effective phosphorus reduction rate of sand 0.55mg / kg · d. Clay 1.25 mg / kg. d.