关键词: 烤烟, 数学模型, 施肥, 氮肥, 磷肥, 钾肥, 微肥, 有机肥

Abstract: We have studied the method of comprehensive application of fertiliaers to flue-cured super tobacco with the square-regression orthogonolo gyrating design. Our resrlts have given us following suggestions:(1) under the ecological condition in Hongbei area of Xichang, the effect order of the fertilizers appkied to tobacco arranging like this: phosphorus > potassium > organic > nitrogenous > trace; our experiments and production experiences have sown that the key method of increasing the output value of tobacco is controlling nitrogenous, increasing phosphorus and potassium, supplementing manure and rationa distributing nitrogenous, phosphorus and potassirm. (2) the comprehensive application of fertilizers to tobacco yielding the output value of 500 Yuan per mu has a proper range of quantity.(3)there exist obvious interactions between phosphorus and potassium, nitrogenous and phosphorus.

Key words: FLUE-CURED TOBACCO, MATHEMATIC MODE, APPLICATION OF FERTILIZEOS, NITROGENOUS FERTILIZER, PHOSPHOROUS FERTILIZER, POTASSIUM FERTILIZER, TRACE FERTILIZER, ORGANIC FERTILIZER