CAJ | 학술논문

采用盆栽试验方法，研究了玉米苗期不同水氮组合对生物量的影响，建立了不同水氮组合条件下干物质积累量的回归模型。结果表明：轻度干旱时，各生物量减少不明显，水分胁迫使根冠比提高，在根冠比较低时对干物质积累量最为有利；在土壤含水率为31．81％、施氮量为4．23g/kg 时，干物质积累量最大；在不影响苗期植株正常生长状态下，土壤含水率下限为22．56％。
채용분재시험방법，연구료옥미묘기불동수담조합대생물량적영향，건립료불동수담조합조건하간물질적루량적회귀모형。결과표명：경도간한시，각생물량감소불명현，수분협박사근관비제고，재근관비교저시대간물질적루량최위유리；재토양함수솔위31．81％、시담량위4．23g/kg 시，간물질적루량최대；재불영향묘기식주정상생장상태하，토양함수솔하한위22．56％。
We conducted the studies for the effect on biomass under different water and nitrogen treatments at the seeding stage of maize using pot experiment .Then we created a regression model based on the dry matter accumulation under dif-ferent water and nitrogen treatments .Results shows that the decrement of biomass is unobvious on the condition of mild drought and water stress promote the root shoot ratio .In addition , it is most favorable to accumulate dry matter at a low root shoot ratio .The maximum accumulation of dry matter appears with the soil water content reaches 31 .81% and the nitrogen rate gets 4.23g/kg.Besides, the lower limit of the soil water content is 22.56% to make sure the normal growth of the plant .