覆膜与露地春玉米氮肥效应研究  

STUDY OF THE EFFECT OF NITROGEN FERTILIZER OF SPRING MAIZE COVERED AND UNCOVERED WITH FILM

作　　者：索全义[1] 索凤兰[1] 王颖[1] 王文玲[1] 

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010019

出　　处：《内蒙古农业大学学报（自然科学版）》2000年第S1期98-102,共5页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

摘　　要：在不同的氮肥施用水平下 ,覆膜均使玉米的绝对株高增加 ,株高日增速、叶面积增长速率提高 ,这为提高光能利用率创造了良好的条件。在各氮素水平下 ,覆膜使叶片中叶绿素含量前期 (7月 2 8日前 )降低 ,后期增加 (7月 2 8日后 )。覆膜并没有明显地改变氮素肥料效应形式 ,只是提高了肥料效应 ,氮素的增产作用更加明显。经济分析结果表明 ,覆膜后增加了氮肥施用利润 ,在最佳施肥点 (R=0 )比露地亩增利润 2 5 .5 6元 ,而施肥量却降低了0 .3kg/亩 ,肥料成本降低了 0 .91元 /亩 。Under the different level of applying nitrogen fertilizer,the absolute plant height was increased with film,and the growth rate of plant height and leaf area was increased,too. It brought about good condition for increasing light utilization.Under the different level of nitrogen fertilizer,the chlorophyll content of leaf was decreased with film before 28 on July,but it was increased after 28 on July.It indicated that the nitrogen element productivity was improved.The effect form of nitrogen fertilizer was not changed evidently,only was the effect of fertilizer increased and the function of increasing yield was more obvious.The economic analyzing results indicated that the profit of applying nitrogen fertilizer was increased with film,and it was increased by 25.56 Yuan per mu at the best spot of application,but the amount of applying fertilizer was decreased by 0.3 kg per mu and the fertilizer cost was decreased by 0.91 Yuan per mu.So the risk of investment was also decreased with film.

关 键 词：春玉米 覆膜 露地 氮肥 

分 类 号：S513.05/.06[农业科学—作物学]