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用石灰性紫色土盆栽红三叶草,研究了土壤缺硼(0.13ppm)、适量硼(0.75ppm)和高硼(5.0ppm)对红三叶草吸收K、Ca、Mg、P、Mn、Zn、Cu和Mo等养分的影响。结果表明,随着供硼水平的提高,上述诸元素的单株吸收量相应增大,但其增加的幅度则因元素种类、生育期不同而有差別。按红三叶草体内的元素浓度计,则有相反的趋势。缺硼明显抑制红三叶草对K等元素的吸收,高硼则无明显的影响。计算各种元素的平均吸收速度的变化规律,证明与红三叶草的平均生长速度的变化规律一致。根据上述结果,作者提出评价硼对养分吸收的影响,应综合考虑养分浓度、吸收量和吸收速度。
The effects of boron deficiency (0.13ppm), appropriate boron (0.75ppm) and high boron (5.0ppm) on absorption of K, Ca, Mg, P, Mn, Zn and Cu in red clover were studied by using potted red clover in calcareous purple soil. Mo and other nutrients. The results showed that with the increase of boron supply, the uptake of each element increased correspondingly, but the increase range was different due to different element types and growth period. According to the elemental concentration of red clover body, there is the opposite trend. Boron deficiency significantly inhibits the absorption of K and other elements by red clover, while high boron has no obvious effect. The change rule of the average absorption speed of various elements was calculated, which proves the same with the variation of the average growth rate of red clover. Based on the above results, the authors propose to evaluate the effect of boron on nutrient uptake, taking nutrient concentration, uptake and absorption rate into account.