Journal
AMERICAN JOURNAL OF POTATO RESEARCH
Volume 97, Issue 3, Pages 318-324Publisher
SPRINGER
DOI: 10.1007/s12230-020-09783-3
Keywords
Phosphorus supply times; Tuber number; Tuber weight; Drip fertigation; Sandy soil; Phosphorus uptake
Categories
Funding
- National Key R&D Program of China [2017YFD0200200, 2018YFD0200801]
- National Natural Science Foundation of China [31760356]
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Increasingly, phosphorus (P) fertilizer is being applied in Inner Mongolia of China to overcome the problem of insolubility of phosphorus in calcareous soil and meet the growth demand of potato plants. As a result, phosphorus use efficiency (PUE) in potatoes decreases continually. In this four-year study in sandy soils, drip fertigating potatoes with phosphorus during the growth season improved phosphorus uptake, plant growth, tuber yield, and PUE. Results show that relative to a single phosphorus application, using a split phosphorus application regime through drip irrigation significantly increased the leaf area index (LAI) and phosphorus uptake rate in the mid and late growth stages of potatoes, and enhanced potato yield and PUE. We concluded that split phosphorus application has the potential to benefit sustainable potato production in Inner Mongolia of China.
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