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出苗不良是半干旱地区高粱生产受限的主要原因。已知土温高于45℃会影响高粱种子萌动及其后胚芽的伸长,致使出苗稀疏或出苗不匀。根据记载,印度、西非和南非农田的土表温度经常高于45℃,甚至有过高达60℃的记录,已证明高土温下的出苗能力存在遗传变异,并鉴定出一些在55℃土温下仍能穿出土表的品系。最近,Soman等(1985)评价了几种为研究高土温下禾谷类幼苗萌动和出苗的反应而提出的技术。当土壤水分和土表硬壳为非限制因素时,此文还描述了一种筛选高粱品系穿透灼热土壤
Poor emergence is the main reason for the limited production of sorghum in semi-arid areas. Soil temperature is known to be higher than 45 ℃ will affect sorghum seed germination and germination after elongation, resulting in sparse emergence or uneven emergence. According to the records, the surface temperature of farmland in India, West Africa and South Africa is often higher than 45 ℃ and even up to 60 ℃. Genetic variation has been demonstrated in the emergence ability at high soil temperature and some soil temperature Under the table can still wear out the strains. Recently, Soman et al. (1985) evaluated several techniques developed to study the germination and emergence of cereal seedlings at high soil temperatures. When soil moisture and hard surface crusts are non-limiting factors, this article also describes a screening of sorghum lines that penetrate hot soil