摘要
采用氮、磷、锌3因素5水平最优回归设计,在田间条件下探讨了钙质紫色土中氮、磷、锌对大麦量产及肥效的影响。结果表明,当施氮量在75kg/ha以下时,不必施用锌肥;氮用量超过75kg/ha时,施锌能较大度幅地提高大麦产量。锌在平衡氮、磷养分中起着重要作用,锌与氮、磷间对大麦产量存在较大的正连应。在每公顷施75—112.5N、60—120公斤P_2O_5、30～75公斤ZnSO_4·7H_2O的最优施肥方案下,可获得3225kg/ha以上的产量,且大麦品质良好,肥料利用率较高。
The field experiment in the effect of different rates of Zn, P, N on nutrition of barley grown in calcareous purple soil (Red-brown Purple soil)was carried out with the best pluratistic regresion design of three factors of five levels. It was necessary to apply Zinc when N rate was more than 75 kg/ha. Zinc played an important part in balancing N, P nutrients. The combinations ofN Zn and PZn were beneficial to the increase of the yield. Theoretical yield of 125 sets of NPZn combination were gotten from the effective function by computer simulating. 7 sets were chosen for economically high yield and good quality exprersed as 75-112.5 kgN, 60-120kg P_2O_5, 30-75kg ZnSO_4·7H_2O/ha. The high yield with good quality (over 3225 kg/ha) was gotten and the utilization ratio of fertilizer was higher under this condition.
出处
《西南农业大学学报（自然科学版）》
CSCD
1989年第4期396-400,共5页
Journal of Southwest Agricultural University
关键词
大麦
锌
磷
氮
营养
barley
Zinc
Phosphorus
Nitrogen
nutrient ratio
