Abstract: This study was conducted to test the TL root soaking method on correcting iron deficient chlorosis in Chao soil in Dezhou city,Shandong province.The results showed that six days after TL₁ root soaking,the total iron and active iron of apple leaves were increased by 104.16% and 307.61%respectively,comparing with ck.Fourteen days later,the total iron and active iron were increased by 147.35% and 393.04% respectively and reached the peaks.The values then began to drop.Six days after TL₂ root soaking the total iron and active iron of apple leaves were increased by 273.22% and 642.14% respectively,comparing with ck.The parameters then began to fall After TL₁ application, the total iron and active iron of apple flowers were increased by 140.79% and 137.24% respectively, and the fruit quantity and fruit set percentage were increased by 230.35% and 696.56% respectively,yet the flower quantity was decreased by 25.18%.After TL₂ application, the total iron and active iron of apple flowers increased by 157.90% and 189.16% respectively, the flower quantity,fruit quantity and fruit set percent age were increased by 38.21%,214.82% and 150.46% respectively.The study indicated that both TL₁ and TL₂ applications had beneficial effects on correcting iron deficient chlorosis, yet TL₁ application was better and more profitable.

Key words: Apple tree, Iron deficient chlorosis, Correction, Root soaking

CLC Number: 

• S666.1