Study on the Development Law of Different Summer Peanut Varieties at Seedling Stage
The high oleic acid peanut variety Yuhua37(YH37)and ordinary oleic acid peanut vari-ety Wanhua2(WH2)were used as the research materials,and the pot experiment was used to investi-gate the changes of morphological development,leaf function and hormone content of different peanut varieties at seedling stage,so as to provide theoretical basis for formulating accurate and scientific management measures.The results showed that the seedling development rules of the two varieties were different.Yuhua37 mainly grew in the underground part at the seedling stage.On the 28th day after emergence,the contents of gibberellin,cytokinin and auxin in the underground part of Yuhua37 were 1.06,1.22 and 1.09 times of those of Wanhua2,respectively.The root length,root tip number,root dry mass and root cap were 75.51％,95.03％,10.64％and 29.84％higher than those of Wan-hua2.At the seedling stage,the growth of Wanhua2 was dominated by aboveground.On the 28th day after emergence,the main stem height,lateral branch length,leaf number,branch number and dry mass of Wanhua2 were 12.41％,65.00％,6.12％,7.69％and 17.47％higher than those of Yuhua37,respectively.Compared with Wanhua2,the light conversion ability of Yuhua37 leaves increased gradu-ally,and the phi2 value increased from 97.47％to 100.93％.Yuhua37 leaves had stronger light protec-tion ability and suffered less light damage during the whole growth period.Based on these results,at the seedling stage,Yuhua37 should be appropriately supplemented with medium and trace elements to ensure the coordinated growth of its aboveground and underground parts,while Wanhua2 should re-duce the amount of foliar fertilizer and the amount of conditioner with promotion function on the growth of stems and leaves,so as to achieve the purpose of strong development of the seedlings.
万方数据
维普
