不同钾肥对小麦种子水培效果的影响

Effects of Different Potassium Fertilizers on Hydroponics of Wheat Seeds

为了研究等钾含量条件下不同肥料对小麦幼苗生长的影响,以“济麦22”为研究对象,开展小麦种子水培试验,通过对小麦幼苗苗高、主根长、主根粗及干重等指标测定分析,综合评价不同钾肥对小麦幼苗影响效果。结果表明:在小麦幼苗苗高及干重方面,腐植酸产品Ⅰ和腐植酸产品Ⅱ两个处理较对照增长率最高,其次是KCl的两个处理,而K_(2)SO_(4)和KH_(2)PO_(4)各自的两个处理较对照也有不同程度的提升,不同钾肥在提高小麦幼苗苗高及干重生长方面有一定的促进作用。在小麦根系生长方面,仍是腐植酸产品Ⅰ和腐植酸产品Ⅱ两个处理的主根长较对照增长率最高,而KCl(对应腐植酸产品Ⅰ中的钾含量)处理较对照仅有3.73%的增长率,其余处理的主根长均低于对照。可见,此浓度下的钾离子会出现抑制小麦幼苗主根长生长的现象。整体来说,钾含量相同条件下,腐植酸对促进小麦幼苗生长具有较明显作用。

In order to study the effects of different fertilizers on the growth of wheat seedlings under the condition of equal potassium content,“Ji Mai 22”was taken as the research object to carry out hydroponic experiment on wheat seeds.The effects of different potassium fertilizers on wheat seedlings were comprehensively evaluated based on the measurement and analysis of seedling height,taproot length,taproot diameter and dry weight of wheat seedlings.The results showed that the two treatments of humic acid productⅠand humic acid productⅡexhibited the highest growth rate compared with the control in terms of seedling height and dry weight,followed by the two treatments of KCl,and the two treatments of K_(2)SO_(4)and KH_(2)PO_(4)showed different degrees of improvement compared with the control.Different potassium fertilizers had certain promoting effect on the growth of wheat seedlings in terms of seedling height and dry weight.Humic acid productⅠand humic acid productⅡstill had the highest growth rate of main root length compared with the control in terms of wheat root growth,while the treatment with KCl(corresponding to potassium content in humic acid productⅠ)had only 3.73%growth rate compared with the control,and the main root length of other treatments were lower than that of the control.At this concentration,potassium ions would inhibit the taproot growth of wheat seedlings.On the whole,humic acid had an obvious effect on the growth of wheat seedlings under the same potassium content.