有机肥对盐碱土蓖麻苗生长的调控作用

为探索有机肥对于盐胁迫下蓖麻幼苗生长的影响,以淄蓖麻5号为试验材料,采用盆栽试验,研究2个盐碱土梯度(0.11％和0.19％)和3种有机肥(蚯蚓肥、菌肥和农家肥)对蓖麻苗的形态指标和生理指标及生物量等的影响.结果表明:盐胁迫显著抑制了蓖麻苗高、功能叶叶面积和单株干鲜重,并降低了渗透调节物质可溶性糖和丙二醛含量、POD和SOD的活性等；有机肥对蓖麻苗生长影响显著,施用蚯蚓肥的蓖麻苗的株高、地茎粗、功能叶叶面积、单株鲜干重较大,保护酶活性较大,叶绿素a、总叶绿素和类胡萝卜素含量较高；施用蚯蚓肥和菌肥的蓖麻苗根系比重较大,渗透调节物质可溶性糖、可溶性蛋白和丙二醛含量较高.有机肥尤其是蚯蚓肥对盐胁迫下蓖麻苗的生理生态都有很好调控作用,更有利于促进盐碱土上培育蓖麻壮苗.菌肥对促进壮苗也有较好作用.

Effect of organic fertilizer on growth of castor bean seedling under saline sodic soil

A pot experiment was conducted to explore the effect of organic fertilizer on growth of castor bean seedlings under saline sodic soil in a greenhouse.The soil had two different salt concentrations of 0.11% and 0.19%.The used organic fertilizer were vermicompost,bacterial manure and cow dung.on the measured parameters included the morphological trait,physiological indicators and biomass of castor bean seedlings.The result indicated that salt stress inhibited the height,leaf area,dry and fresh weight,and reduced the content of soluble sugar and MAD,the activity of SOD and POD.The organic fertilizer had significant effect on castor bean seedlings.Vermicompost enhanced the height,stalk diameter,leaf area,dry and fresh weight,the activity of enzyme,the content of chlorophyll a,total chlorophyll,carotenoid.Both vermicompost and bacterial manure increased the weight ratio of castor bean root,the content of soluble sugar,soluble protein and MAD.It can be included that organic fertilizer,particularly vermicompost,had more positive effect on the regulation of castor bean seedlings under saline-alkali soil,and benefit for incubating strong castor bean seedlings.The bacterial manure had the similar role in the seedling growth.