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| Effects of Urea on Asparagu’s Flower and Fruit Thinning |
| JIA Hai-min1，ZHAO Ju-ying1*，CHEN Dan1，LEI Dong-xia2，JIANG Xiao-li3 |
| 1Institute of Plant Protection， Hebei Academy of Agriculture and Forestry Sciences， Baoding 071000， Hebei，China；2Xushui County Agriculture and Animal Husbandry Bureau， Hebei Province， Xushui 072550， Hebei， China；3Baoding City Water Conservancy Bureau， Baoding 071000， Hebei， China |
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Abstract Different concentrations of urea plus different applying times were utilized to asparagus（Asparagus officinalis L.）as flower and fruit thinning treatment. The results showed that foliar sprays of urea in blossom could decrease fruit setting rate in the flowering stage of asparagus，and 3% urea successive spray for 3 times had the best effect with 8% fruit setting rate and no fertilizer damage occurred. These 3 urea concentrations treated in 3 different time periods had certain flower and fruit thinning effects on asparagus，and even could promote plant grow th and enhance disease resistance.
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Received: 29 October 2012
Published: 06 January 2013
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