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当外界环境条件相同时,冬小麦生长初期(播种到分蘖)的发育速度,各个品种都相同。这也为在罗斯托夫州的一些气象站于不同年份对各个品种进行的观察所证实。但分蘖势不仅与麦田充足水分保证率有关,而且还与营养物质,首先是土壤中的硝态氮含量有关。 1977年秋季,由于雨水对土壤的强烈淋溶,各地冬作物普遍缺乏硝态氮。甚至在休闲地上播种的冬作物,每百克土壤缺氮2-3毫克,故该年分蘖势较差。但就在那样缺硝态氮情况下,尽管休闲地上及非休闲前作植株发育速度相同,还是发现在休闲地后播种的冬作物分蘖势显著增高,因为休闲地土壤湿润状况良好。
When the external environmental conditions are the same, the growth rate of winter wheat (sowing to tillering) is the same for all varieties. This is also confirmed by observation of various species at different weather stations in the Rostov region in different years. However, the tillering potential is not only related to the adequate moisture content in the wheat field, but also to the nutrients, above all the nitrate content in the soil. Autumn 1977, due to the strong rainfall on the soil leaching, winter crops generally lack of nitrate nitrogen. Winter crops sown even on leisure grounds, with 2-3 milligrams of nitrogen deficiency per 100 grams of soils, have less tillers during the year. However, in the case of nitrate-deficient nitrogen, the tillering potential of winter crops sown significantly higher after fallow was found despite the same growth rates of plants on fallow ground and non-recreational grounds, as fallow soil was well-watered.