论文部分内容阅读
本试验通过不同土壤类型、不同播种量、不同种子预处理和不同肥水管理方案的比较观测与整体组装 ,研究出龙须草壮苗培育技术。该技术核心是 :选择沙性土 ,在整地前每 hm2 施过磷酸钙 750 kg,然后精细整地并彻底清除杂草 ,再按 1.5m厢宽开厢、浇透厢水后播种 ;选用当年收获的种子、每 hm2 按 375kg左右的播种量播种 ;播种前将种子置于清水中浸透 ,播种时分厢过称、来回匀播 ;播后通过镇压使种子与湿土紧密结合 ,最后用细土覆盖 1cm,并适当镇压。出苗后 ,每 hm2 追施尿素 4 5kg并结合浇水 1次 (或择雨前追施 ) ,接着除草 1次 ;出苗后约 2 5d每 hm2 再追施尿素 75kg并结合浇水和除草 1次 ,5d后即可移栽
In this experiment, through comparative observation and overall assembly of different soil types, different sowing rates, different seed pretreatment and different fertilizer and water management programs, we developed a strong seedling cultivation technology. The core technology is: Select sandy soil, before the preparation of land per hm2 calcium phosphate applied 750 kg, and then finely ground and completely remove weeds, and then wide open box 1.5m, Seeds per hm2 sowing about 375kg sowing; seeds before sowing in clear water soaked seed sowing, back and forth evenly broadcast; after sowing through the cracks so that seeds and wet soil closely, and finally covered with fine soil 1cm, and appropriate suppression. After emergence, each hm2 topdressing urea 45kg and combined with watering 1 (or choose to rain before the chase), and then weeding 1; about 2 5d after emergence of each hm2 and then topdressing urea 75kg and combined with watering and weeding 1 , 5d after transplanting