有机肥料氮在早稻土壤中的矿化状况

MINERALIZATION OF NITROGEN IN ORGANIC MANURE IN PADDY SOIL DURING THE SEASON OF EARLY RICE

根据紫云英、猪粪施于稻田的试验结果,应用回归分析建立了土壤供氮累计量与时间(植后天数)之间、有机肥料氮矿化量与时间(植后天数)之间的相关方程,阐明了有机肥料的氮素矿化状况,并演算出有机肥料氮在水稻各生育期的矿化分配率。这些试验结果为有机无机肥料的合理施用提供了参考依据。

Based on the data from the experiment on the mineralization of nitrogen in green manure and pig muck in paddy soil during the season of early rice,and by using the regression analysis, we set up hyperbola equations between accumulative amount of soil nitrogen-supplying and days after transplantation,and perabola equations between amount of mineralized N from organic manure and days after transplantation. The status of mineralization of nitrogen was illustrated by the perabola equations,and the mineralization rates in each growing stage of rice could be calculated by the hyperbola equations. All these results could provided an important reference for the rational application of organic manure and inorganic fertilizer.