Abstract: The sand experiment was conducted to study the responses of different wheat genotypes on zinc supply.According to the comparison among the root to shoot ratios,based onwhether the root to shoot ratios were more than 1 or less than 1,aswell as the observation results were considered,the 25 genotypes of wheat were classified into two types,namely,susceptible genotypes and non-susceptible genotypes,this classification was mainly based on the severity and time of occurrence of zinc deficiency.The result showed that zinc supply could accelerate the growth of wheat shoot and root and increase the chlorophyll SPAD value(The increased range of 18 wheat genotypes among 25 genotypeswere more than 10% ),the root shoot ratio hold the comparative stabilization.The correlation was not significant between the zinc content of seed and chlorophyll SPAD value,and between the root shoot ratio of seedling and chlorophyll SPAD value.Because zinc content in the shoot was relatively high,the zinc non-sensitivity type can mitigate effectively damage caused by zinc deficiency.The comparison between the zinc non-sensitivity and zinc sensitivity was carried out,the mean of zinc content in the shoot and root increased 96.6%and 28.8%under zinc deficiency,respectively; it increased 47.6%and 10.9% under zinc supply,respectively.Zinc supply could not affect phosphorus content of the nonzinc sensitivity and zinc sensitivity wheat plant.The P/Zn ratioswere affectedmainly by the change of zinc content inwheat plant and did not have obvious relation to phosphorus content.

Key words: Wheat, Genotype, Zinc rate, Susceptible genotypes to zinc deficiency

CLC Number: 

• S512.1+1