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根据近年来调查,对高产大麦和小麦要求要“年内要苗足,有效穗适当,成穗率高”.具体要求是大麦年内要发足35～40万苗,最高苗控制在60万苗左右,有效穗达到30～35万穗;小麦要求年内苗32～35万苗,最高苗控制在55～60万苗,有效穗达35万穗。要达到这样一个合理的群体结构,应在适时播种、施足基肥、保苗健苗的基础上,按叶龄的
According to surveys in recent years, the demand for high-yielding barley and wheat needs to be “enough to seedlings during the year, with appropriate effective spike and high spike rate.” The specific requirement is that barley should be given 35 to 40 million seedlings during the year and the highest seedling should be controlled at about 600,000 seedlings , The effective spike reached 30 to 350,000 spikes; wheat requires 32 to 35 million seedlings in the year, the highest seedling control in the 55 to 60 million seedlings, the effective spike up to 350,000 spikes. To achieve such a reasonable group structure, should be timely sowing, Shizujifei, Miao Jian Jian Miao on the basis of leaf age