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pj198811

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Carey117

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pj198811: ½ð±Ò+20, ·­ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú, ·Ç³£¸Ðл 2012-07-02 11:15:32
ÊÔÑé¹²Éè4¸ö´¦Àí¡£1£©CK£¨²»Ê©·Ê£©£»2£©N 450 kg/hm2£»3£©P2O5 225 kg/hm2£»4£©K2O 250 kg/hm2¡£µª·ÊÓÃÄòËØ£¨N 46%£©£¬Á×·ÊÓùýÁ×Ëá¸Æ£¨P2O5 12%£©£»¼Ø·ÊÓÃÁòËá¼Ø£¨K2O 51%£©£»È«²¿Á׷ʺͼطʡ¢50%µª·ÊÒÔ»ù·Ê4ÔÂ15ÈÕÊ©È룬ʣÓàµÄ50%µª·ÊÔÚ7ÔÂ25ÈÕÒÔ×··ÊÊ©Èë¡£²»Í¬´¦ÀíÖ®¼äÏà¸ô3Ãס£²ÉÓÃÍêÈ«Ëæ»úÉè¼Æ£¬Ã¿¸öÐ¡Çø3ÖêÀæÔ棨ÊÔÑéÐ¡ÇøÃæ»ý2 m¡Á3 m£©£¬3´ÎÖØ¸´¡£

Experiments were carried out in four scenarios, including CK (no fertilization), nitrogenous fertilizer of 450 kg/hm2, phosphatic fertilizer of 225 kg/hm2, and potash fertilizer of 250 kg/hm2. The nitrogenous fertilizer, phosphatic fertilizer and potash fertilizer were applied in the form of carbamide (N 46%), superphosphate fertilizer (P2O5, 12%) and Potassium sulfate (K2O 51%), respcetively. The whole amounts of phosphatic fertilizer, potash fertilizer and 50% of nitrogenous fertilizer were applied in soil as basal dressing on the 15th April. The remained 50% of nitrogenous fertilizer were applied as top dressing on the 25 th July. The interval between the experimental fields for different scenarios application is 3m. With the totally random design, there were 3 copy fields for each scenarios, with each field planting 3 trees of pear Chinese date (experiemntal field area is 2m*3m).

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