| Influences of different application methods of micronutrient fertilizers to yield and content of zinc and iron in potato |
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| DOI：10.7606/j.issn.1000-7601.2017.02.24 |
| Key Words: potato micronutrient fertilizer yield content of zinc and iron |
| Author Name | Affiliation | | LUO Lei | Dingxi Academy of Agricultural Sciences, Dingxi, Gansu 743000, China | | LI Ya-jie | Dingxi Academy of Agricultural Sciences, Dingxi, Gansu 743000, China | | HUANG Kai | Dingxi Academy of Agricultural Sciences, Dingxi, Gansu 743000, China | | YAO Yan-hong | Dingxi Academy of Agricultural Sciences, Dingxi, Gansu 743000, China | | WANG Juan | Dingxi Academy of Agricultural Sciences, Dingxi, Gansu 743000, China | | LI De-ming | Dingxi Academy of Agricultural Sciences, Dingxi, Gansu 743000, China |
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| Abstract: |
| With the purpose to analyze the influences of two different application methods (soil application and spraying) of micronutrient fertilizers to tuber yield and content of zinc and iron in potato, using Dingshu 1 as test material, a field experiment was conducted with 13 treatments, i.e., zinc sulfate, ferrous sulfate and manganese sulfate as base fertilizer (D1, D2 and D3), spraying with 0.2% aqueous solution in budding period, flowering period and tuber expanding period (A1, A2, A3, B1, B2, B3, C1, C2 and C3), and no application as control (CK). The results showed that the application of micronutrient fertilizers reduced plant height by 0.9～3.9 cm, increased stem diameter by 0.02～0.13 cm, increased tuber number per plant by 0.13～0.86, increased yield per plant by 0.002～0.18 kg, increased average tuber weight by 7.48～12.04 g, and extended growth duration by 1～8 days. The production could be increased by 18.4%～25.7% by spraying zinc sulfate in budding period, flowering period and tuber expanding period and spraying manganese sulfate in budding period. Spraying zinc sulfate in budding period could improve zinc content in tubers by 2.2 mg·kg-1, while spraying zinc sulfate, ferrous sulfate, manganese sulfate in budding period, spraying ferrous sulfate in flowering period, and applying manganese sulfate as base fertilizer could increase iron content by 2.0～9.0 mg·kg-1. |
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