| Effects of fertilizer application on potato yield and water use efficiency in dry areas at northern foot of Yinshan Mountain |
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| DOI：10.7606/j.issn.1000-7601.2014.06.019 |
| Key Words: fertilizer application potato yield soil water content water use efficiency |
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| Abstract: |
| Taking the potato variety of “Kexin 1” as the experimental material, using randomized block design, has studied the effects of different fertilizer on potato yield and water use efficiency, which was experimented for consecutive three years of fertilization at northern foot of Yinshan Mountain. The results showed that: For all fertilization treatments and potato growth stages, the soil moisture content in 0～80 cm was total lower than the control group. The total water consumption in whole growth period was increased 0.17%～4.16% comared with control; the dry matter accumulation was significantly higher than control. The potato yield and commodity rate of each treatment were significantly higher than control under fertilization condition; the increasing amplitudes of yield and commodity rate were achieveed 5.8%～49.67% and 13.97%～55.14%, respectively. The effect of M+NPK treatment was the most obvious, the yield in 2011 and 2012 was reached 36 863.70 kg·hm-2 and 31 386.14 kg·hm-2, respectively. The next was the NPK and M treatment. The water use efficiency of all fertilization treatments were total higher than the control. Among them, the M+NPK treatment was the highest in two years was higher 43.72% and 44.09% than CK, follow by the NPK and M treatment. Combined organic fertilizer with NPK was the most suitable fertilizer ratio for local potato planting. |
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