不同施肥处理烤烟氮磷钾吸收分配规律研究

为研究不同施肥处理条件下烤烟氮磷钾吸收积累规律,进行了田间随机排列试验,结果表明,有机无机配施处理烤烟氮、磷、钾积累量分别为130.64 kg/hm2、27.35 kg/hm2、230.03 kg/hm2,单施有机肥分别为67.25 kg/hm2、14.31 kg/hm2、114.7 kg/hm2,不施肥处理分别为40.08 kg/hm2、10.14 kg/hm2、82.46 kg/hm2.不同施肥处理烟株氮磷钾积累强度均在移栽后60-75d达到最高值.烟株氮、磷、钾在根、茎、叶器官分配顺序:叶＞茎＞根,叶的积累量大于茎、根积累量之和.每生产100kg干烟叶,不施肥处理氮、磷、钾需要量分别为2.63 kg、0.65 kg、5.31kg,单施有机肥处理分别为3.16 kg、0.67kg、5.14kg,有机无机肥配施处理分别为4.26 kg、0.89 kg、6.65kg.

Studies on laws of N,P,K uptake and distribution of flue-cured tobacco with different fertilizer treatments

Field experiment was carried out to study N,P,K uptake and distribution in flue-cured tobacco with three various fertilizer treatments.Results indicated that the amount of N,P,K absorption in flue-cured tobacco were 130.64 kg/hm2,27.35 kg/hm2 and 230.03 kg/hm2 respectively with combined organic and inorganic fertilizers,while 40.08 kg/hm2,10.14 kg/hm2,82.46 kg/hm2 respectively without fertilizer application,and 67.25 kg/hm2,14.31 kg/hm2,114.7 kg/hm2 respectively with only organic fertilizer.The peak of N,P,K accumulation rate appeared 60-75d after flue-cured tobacco planting.The order of N,P,K distributed in root,stem and leaf was as follows: leaf>stem>root,and the amount of N,P,K accumulated in leaf was more than the sum amount in stem and root.To produce 100kg tobacco leaf,the required amount of N,P,K were 2.63 kg,0.65 kg,5.31kg respectively without fertilizer,3.16 kg,0.67 kg,5.14kg respectively with only organic fertilizer,and 4.26 kg,0.89 kg,6.65kg respectively with combined organic and inorganic fertilizers.