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1959年为探索简易的防止倒伏措施,利用高浓度的植物生长激素,如2,4-D,α-萘乙酸等,对水稻进行喷射处理,同年秋在小麦上进行同样试验,看出对水稻和小麦生长有明显的抑制和促进茎稈粗短,增强抗倒能力,尤以小麦效果更为显著。在此基础上,1960—1961年用南大2419小麦在田间进行小区试验。2,4-D浓度为0.05%,0.1%,0.2%,0.5%四种,喷射时期分幼穗分化开始前、幼穗生长锥开始伸长期、单棱初期、单棱末期、二棱初期、二棱末期、小花原始体分化期等七个时期。种子播种量分每亩播15万粒,30万粒,60万粒三种。定期测定植株高度,观察幼穗分化,乳熟期进行茎稈解剖,收获后考种。
In 1959, in order to explore a simple measure to prevent lodging, rice plants were sprayed with high concentrations of plant growth hormones such as 2,4-D and α-naphthalene acetic acid, and the same experiment was conducted on wheat in the autumn of the same year. And wheat growth significantly inhibited and promote stem stubby, enhance the ability to lodging, especially wheat effect is more significant. On this basis, 1960-1961 with Nanda 2419 wheat field trials in the field. The concentrations of 2,4-D were 0.05%, 0.1%, 0.2% and 0.5% respectively. Before spike differentiation, the young spikelet began to elongate, Erlian the end of the floret primitive differentiation period of seven periods. Seed sowing points per acre broadcast 150,000, 300,000, 600,000 three. Plant height was measured periodically to observe the spike differentiation, milk stalks stalks dissected, test after harvest.