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1986年对遵义、绥阳、金沙三个分点烤烟田间小区试验地土壤分析结果,初步看出:①探讨土壤供给烤烟生育需要的活动性氮量时,除测定碱解氮外,还应测定铵态氮和硝态氮。②烤烟大田生长期,遵义试点亩施氮6公斤、金沙试点亩施氮6.5公斤是较佳的施氮量。③在施氮基础上,协调磷钾供应时,遵义试点应施氮6.0公斤/亩、磷12公斤/亩、钾16.5公斤/亩,即N:P:K=1:2:2.75;金沙试点应施氮6.5公斤/亩、磷13公斤/亩、钾16.5公斤/亩,即N:p:K=1:2:2.54比较适宜。④烤烟生长期,土壤硝态氮含量高于铵态氮,烟秆拔除后,铵态氮高于硝态氮。说明烤烟对硝态氮有特殊需求,应注意配施。
In 1986, the soil analysis results of three experimental plots of flue-cured tobacco field in Zunyi, Suiyang and Jinsha were preliminarily found: ① When discussing the amount of active nitrogen needed for the fertility of flue-cured tobacco supplied by soil, Ammonium and nitrate. ② Flue-cured tobacco field growth, Zunyi pilot mu nitrogen fertilizer 6 kg, Jinsha N mu 6.5 kg nitrogen fertilizer is the preferred amount of nitrogen. ③ On the basis of nitrogen application, in coordination with the supply of phosphorus and potassium, Zunyi pilot should apply nitrogen 6.0 kg / mu, phosphorus 12 kg / mu, potassium 16.5 kg / mu, ie N: P: K = 1: 2: 2.75; Nitrogen should be 6.5 kg / mu, phosphorus 13 kg / mu, potassium 16.5 kg / mu, that N: p: K = 1: 2: 2.54 more appropriate. ④ In the flue-cured tobacco growing season, the content of nitrate nitrogen in soil was higher than ammonium nitrogen. After the removal of tobacco stem, ammonium nitrogen was higher than nitrate nitrogen. Description of flue-cured tobacco nitrate nitrate have special needs, should pay attention to facilities.