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1984—1987年在石灰岩母质的水稻土上设置框栽和田间试验.结果表明:钾、镁肥均显著地影响油菜籽产量,且钾、镁间存在相互效应.土壤缺镁或施用高钾水平均使油菜叶片出现明显的缺镁症状,施用高量钾导致缺镁症状更为严重.油菜植株不同部位的含钾量和吸收量是随土壤施钾水平的提高而增加.镁对油菜植株不同部位含钾量和吸收量的影响,则与施钾水平有关.低钾和中钾水平时,低量镁能促进钾的吸收,而高镁时则抑制钾的吸收.油莱植株不同部位镁的含量是随施镁水平的提高而增加,但随施钾水平的提高而降低.钾、镁都对油菜植株中钙的浓度产生拮抗效应.
Box-planting and field experiments were carried out on paddy soil with limestone parent material from 1984 to 1987. The results showed that both potassium and magnesium fertilizers significantly affected the rapeseed yield, and there were mutual effects between potassium and magnesium. Soil magnesium deficiency or high potassium level All of the rape leaves showed obvious symptoms of magnesium deficiency, potassium deficiency caused more serious symptoms of magnesium deficiency.Calcium content and absorption of different parts of rape plants increased with the increase of soil potassium level.Magnesium was different in rapeseed plants The content of potassium and absorption in the part of the plant are related to the level of potassium fertilization.The low amount of magnesium can promote the absorption of potassium in the low potassium and medium potassium levels and inhibit the absorption of potassium in high magnesium. Increased with the increase of magnesium level, but decreased with the increase of potassium level.K and Mg all antagonized the concentration of calcium in rapeseed plants.