Effects of Zinc Fertilizers on Zinc Content of Potato Plants and Tuber Quality under Rainfed Conditions

doi:10.7668/hbnxb.2017.01.030

Abstract

Abstract: In order to study effects of zinc fertilizers on zinc absorption, accumulation and distribution and tuber quality under rainfed conditions, pot experiment was conducted with two treatments of Zn (Zn) and no Zn (CK control).The results showed that application of zinc fertilizer could increase the zinc concentration in different organs of potato. Two times of spraying zinc fertilizer in the growth period,the zinc concentration in potato leaves of Zn treatment was higher than CK treatment 27.94, 43.89 mg/kg, respectively. The zinc concentration in the tubers after harvest Zn treatment was higher than CK treatment 28.70%; During the whole growing period the accumulation of zinc in all organs of potato of Zn treatment>CK treatment, the zinc accumulation in leaves reached the maximum 66 days after the emergence, Zn treatment was 1.469 mg/plant,CK treatment was 0.328 mg/plant, Zn treatment was three times more than CK treatment. The zinc accumulation and maximum accumulation rate of whole plant and Tubers of Zn treatment were higher than CK treatment 63.62%, 48.43%, 51.58%, 55.26%respectively; During the whole growing period accumulation ratio of zinc of potato stems and roots of Zn treatment>CK treatment, zinc fertilizer increases the distribution ratio of zinc in the stems and roots and reducing the proportion allocated tubers; With the advance of growing tubers VC,free amino acid and starch content of potato tuber were changed in the form of parabola,in late tuber expansion period or starch accumulation period reached its maximum, and reducing sugar content continued downward trend appears.Results showed maturity,the potato tuber VC, free amino acid and starch content of Zn treatment were higher than CK treatment, the ratios were 16.19%,22.11%,16.28%respectively. However, the reducing sugar content of potato tubers of Zn treatment were higher than CK treatment, the value was 22.72%.

Key words: Potato, Zinc fertilizer, Zinc content, Nutritional quality

CLC Number:

MA Zhenyong, DU Hulin, LIU Rongguo, NIU Jinshuai, LIU Chao. Effects of Zinc Fertilizers on Zinc Content of Potato Plants and Tuber Quality under Rainfed Conditions[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2017, 32(1): 201-207. doi: 10.7668/hbnxb.2017.01.030.

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