The wheat seed germination and seedling growth, as well as the effect of humic substances on seed development, were compared using soils and sand as substrates. Russian Plain soils were found to considerably inhibit seed germination. Pre-sowing treatment with humic preparations resulted in a significant stimulation effect on seeds sowed into sod-podzolic soil, but not into sand. Considering a well-known phenomenon of soil allelelotoxicity, we have suggested that stimulation of seed development by humic substances is a result of seed protection by them against the allelotoxin inhibitory effect.

中文翻译：

---

腐殖质刺激种子发芽：现象的性质。

以土壤和沙子为基质，比较了小麦种子的发芽和幼苗生长以及腐殖质对种子发育的影响。发现俄罗斯平原土壤大大抑制了种子发芽。腐殖质制剂在播种前的处理对播种在草皮土壤中的种子产生了显着的刺激作用，但对沙粒则没有影响。考虑到土壤等位基因毒性的众所周知的现象，我们已经提出，腐殖质刺激种子发育是它们保护种子免受种质毒素抑制作用的结果。