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长效玉米专用肥 (免追旺 )在吉林省 7个县 (市 )进行田间试验。结果表明 ,其 1kg养分增收玉米 4 1kg,养分回报率比常规一次性施肥提高 19.8% ,比多施 2 0 %的 15 15 15复混肥提高 2 3.1% ;分别增收 4 85元 / hm2和 2 6 8元 / hm2 。
Long-term corn fertilizer (no changwang) field trials in seven counties (cities) in Jilin Province. The results showed that the yield of nutrients increased by 19.8% compared with conventional single-use fertilizers and 21.1% higher than that of 15 15 15 mixed fertilizers with 20 kg of 1 kg nutrients, respectively, with an increase of 4 85 yuan / hm2 and 2 6 8 yuan / hm2.