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| Effects of Slow-released Fertilizer Instead of Chemical Fertilizer on Growth，Yield and Quality of Garlic Seedlings |
| MAO Zhenyu，XIE Jianming*，HE Zhixue，NIU Tianhang，QIN Haijuan，HE Dongxia |
| College of Horticulture，Gansu Agricultural University，Lanzhou 730070，Gansu，China |
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Abstract Aiming at the issue of excessive chemical fertilizer dosage in garlic seedling production，this paper adopted a field experiment and set up 5 treatments as CK（no fertilization），T1（constant fertilization of local ordinary chemical fertilizer），T2（reduced fertilization of ordinary chemical fertilizer），T3（reduced fertilization of slow-released fertilizer），T4（constant fertilization of slow-released fertilizer） to study the effects of replacing ordinary chemical fertilizer by slow-released fertilizer on the growth，yield and quality of garlic seedling，so as to provide theoretical bases for reducing the dosage of chemical fertilizer．The results showed that comparing with T1 treatment，T3 treatment could significantly increase the stem thickness，leaf width，pseudostem length，root system vigour，photosynthetic pigment content of garlic seedling and remarkably increase the contents of VC，soluble sugar and soluble protein in garlic seedlings．Each index had been increased by 78.2%，84.2% and 12.6%，respectively．T3 treatment could also significantly reduce the nitrate and crude fiber content of garlic seedling and increase the allicin content．Thus，the yield would be increased by 4.1% and net income be increased by 9.7%．In summary，reduced fertilization of slow-released fertilizer（T3） is helpful for the growth of garlic seedlings．It can increase the yield and at the same time significantly improve the quality of garlic seedlings．It has increased the economic benefits．So it is the best treatment in this experiment．
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Received: 08 February 2020
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