| Effects of fertilization and water retaining agent on yield of potato |
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| DOI：10.7606/j.issn.1000-7601.2011.06.29 |
| Key Words: water retaining agent fertilzation yield potato |
| Author Name | Affiliation | | ZHANG Chaowei | Institute of Dryland Agriculture，Gansu Acadeny of Agricultural Sciences, Larchou, Gansu 730070，China
Key Laboratory of Key Laboratory of Northwest Drought resistant Crop Cultivation and Farming， Ministry of Agriculture, Lanzhou, Gansu 730070，China | | DONG Bo | Institute of Dryland Agriculture，Gansu Acadeny of Agricultural Sciences, Larchou, Gansu 730070，China
Key Laboratory of High Efficiency Water Utilization in Dry Farming Region, Lanzhou, Gansu 730070，China | | GUO Tianwen | Institute of Dryland Agriculture，Gansu Acadeny of Agricultural Sciences, Larchou, Gansu 730070，China | | ZHANG Dongwei | Institute of Dryland Agriculture，Gansu Acadeny of Agricultural Sciences, Larchou, Gansu 730070，China |
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| Abstract: |
| Effects of mixed use of fertilizer and water retaining agent on potato yield were studied in semi arid area
of central Gansu. The results showed that the water retaining agent or fertilizer alone could increase potato yield, while the coordinate application of water retaining agent and fertilizer could improve the yield of vegetable remarkably, arisen from interaction effect of water retaining agent and fertilizer. Water retaining agent could improve crown and photosynthesis area of potato. Mixed use of fertilizer and water retaining agent could improve photosynthetic rate and extend growth stage by 8~ 12 d in the leaf and stem of potato in flowering and tuber expansion stage. To sum up，mixed use of fertilizer and water retaining agent could improve high photosynthesis，increase photosynthesis area and prolong photosynthetic period, resulting in an increase in yield. Compared with control, treatment B had significant effect on potato yield, increased by 27.8%. |
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