辽西半干旱区长期施用化肥对玉米苗期生长的影响

The effect of long-term fertilization on maize seedling stage growth in semi-arid area of west Liaoning

对辽西半干旱区的玉米生产进行了不同施肥措施的长期试验 ,在试验进行的第1 0年拔节期对玉米植株生长状况进行观测。结果表明 ,施用氮肥和磷肥均能使玉米的株高和叶面积明显增加 ;长期不施用氮肥会使玉米叶片内叶绿素的形成受到限制 ,不利于有机物质的合成 ;施用氮肥使玉米叶片宽大 ,植株健壮 。

Long term trials of effect of different fertilization measures on maize production were carried out in the semi arid area of west Liaoning and careful observation were taken out on the 10 th year's shot out period. The results show that using N and P can notably improve the seedling height and leaf area; Without N fertilizer for years, it will strain synthesis of chlorophyll in maize leaf, and it will go against the synthesise of organic matter. N fertilizer is in favor of the widening of maize leaf and the haleness of maize springs, and this is the base of maize high yield.