中条山区春玉米高产调查分析

山西省运城地区,常年种植春玉米8～10万亩,主要分布于中条山区,经1991年和1992年高产技术开发,虽逢少雨年型,但因栽培技术得到改进,单产明显提高。以闻喜县石门乡为代表,1992年全乡3221亩玉米,亩产由前三年的303.8kg上升到456kg,增产51％,其中推广地膜覆盖2000亩,亩产680kg,并涌现出一批亩产吨粮的高产典型。主要措施:采用优种(农大60为主)、地膜覆盖、合理密植(亩植4500株左右)、优化施肥(以产定肥,稳氮、增磷、施钾、补锌)、防虫去雄。

Investigations and Analyses on High-yields of Spring Maize in Zhongtiao Mountains

Shi Men Township, weixi County, is located in Zhong Tiao mountains. The climate and ecotype there are suitable for spring maize production. During 1991～1992, the techniques of high-yielding maize were developed and the maize yield increased from 303.8kg to 456kg/mu in the whole township, 3000 mu maize fields. 2000 mu maize fields were mulched with film and the yield came to average 680kg/mu or over 1 ton/mu in film mulched fields. The main measures were as follows: Good varieties (Nongda60, Yedan13) were grew; the fields were mulched with film and increased the density of plants (i. e. 4500 plants/mu); rationally applied fertilizers (to applied fertilizers according to its yield, stably applied N, increased P, applied K and supplemented with Zn); prevented and controled pest insects and emasculate.