全膜双垄沟播玉米干物质积累规律及高产施肥技术

采用田间试验的方法研究玉米干物质积累规律及高产施肥技术。结果表明,在不同施肥方式下,玉米各生育期全株、籽粒、叶片、茎秆+穗芯干物质积累均呈现出"S"型曲线变化规律,玉米全株干物质量均随生育期的延长而增长;N、P2O5和K2O的用量分别为225、1209、0 kg/hm2时(OPT处理),玉米产量最高,可达到9 028.2 kg/hm2,明显高于其他处理,表明玉米在全膜双垄沟播栽培技术条件下,平衡施肥可显著增加玉米籽粒产量,N、P、K缺素施肥及不施肥都会对玉米产量造成不同程度的影响。

Dry Matter Accumulation and High yield Fertilizer Technology of Whole film mulching and double furrow sowing Maize in Semi arid Area

Field trials were conducted to study dry matter accumulation and high-yield fertilizer technology in maize.The results showed that variations of dry matter accumulation in the whole-plant,grain,leaf,and stem with ear during the maize growth periods showed S-shaped curve.Dry matter accumulation of corn whole-plant increased with the course of growth period;the highest yield,9028.2 kg/hm2,was obtained under the conditions of N 225 kg/hm2,P2O5 120 kg/hm2,and K2O 90 kg/hm2 application(OPT treatment),significant...