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八五四开展玉米割苗矮化试验
2017-09-06 08:26:55 中国青年网
本报讯(张丰转记者吴树江)今春八五四分公司农业技术推广中心选择优良地号的高秆玉米品种,进行玉米割苗矮化试验,全程记录玉米的长势变化数据,目前该试验品种长势良好。
玉米割苗矮化试验是在玉米长至5~6个可见叶片时,于第一个可见叶片处把苗割掉,控上促下,强壮根系,以达到抗旱、抗倒伏、抗早衰,减少病虫害、减少分蘖,增加产量的“三抗、两减、一增”效果。据专家介绍,玉米割苗后植株和穗位比未割苗的平均矮30~40厘米,无需喷洒矮壮素,就能实现抗倒伏的目的。割苗玉米植株的根系长度也比未割苗玉米植株的根系长出10厘米,根系发达,营养生长转化为生殖生长的养分增多。而且,割苗后的玉米授粉率高、穗饱满、秃尖少,增产幅度可达20%~30%以上。
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