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本文就柑桔园春草对氮肥肥效的影响和利弊,介绍了最新的研究结果。 1.春草对氮素的吸收日本西南暖地的桔园,在3月上旬施春肥时春草已高达10厘米左右,生长茂盛。为了抑制春草生长,采用中耕、浅耕或除草剂,使桔园成为清耕或裸地。试验在3月上旬浅耕与除草剂并用,一直到5月下旬保持裸地状态。氮的原子量一般是14,但也混有0.36%的氮15,将这种N~(15)浓缩到7.07%的氮作为春肥,以硫铵的形式,每亩5.6公斤氮的施用量施于生草区和裸地区。
In this paper, citrus orchard on the efficiency of nitrogen fertilizer and its advantages and disadvantages, introduced the latest research results. 1. Spring grass on the absorption of nitrogen Japan’s southwestern warm orange garden, spring in early March Shi Chunfei as high as 10 centimeters, growing flourish. In order to inhibit the growth of spring grass, cultivating, shallowing or herbicides are used to make the orangery a clearing or bare land. Trial early in early March with herbicides and used until the end of May remain bare state. The atomic weight of nitrogen is generally 14, but 0.36% of nitrogen is also mixed. The nitrogen concentrated to 7.07% of this N ~ (15) is applied as spring fertilizer and applied in the form of ammonium sulfate at a rate of 5.6 kg / Grass and bare area.