Studies Of The Effect Of Nitrogen, Chlorine, And Boron Fertilizers On The Leaf Dropping, Yield And Quality Of Flue-cured Tobacco Yunyan87

In this paper, based on Single factor randomized block design in field, our study was focused on effects of nitrogen, chlorine, and boron on agronomic performance (such as leaves broken, and several yield traits) of tobacco variety Yunyan87. Subsequently, formulation of nitrogen, chlorine fertilizer, and boron was optimized for suggesting balanced fertilization and effectively reducing tobacco natural the breaking of the tobacco leaves. Therefore, this article provides a scientific basis on improving yield and quality of flue-cured tobacco.The results showed that:(1) there is a certain amount of positive correlation of the breaking of the tobacco leaves occurrence and effect of chlorine and nitrogen application; under135kg/hm2nitrogen treatment, tobacco leaf yield and output value, average price and overall optimal proportion of superior tobacco, were2062.5kg/hm2,55687.5yuan/hm2,27.0(yuan/kg),67.0%, respectively. The rate of broken leaves of tobacco plant and the average breakage of a blade of nitrogen application rate of162kg/hm2, which were40%,0.87/strains, with the least nitrogen application rate of108kg/hm2. under135kg/hm2nitrogen treatment, various grades of tobacco appearance quality is the most ideal and chemical composition of a coordinated. Comprehensive above, when nitrogen is135kg/hm2, flue-cured tobacco leaf quality and economic value is the most ideal.(2)Within a certain range, chloride fertilizer on the growth of tobacco plant, tobacco leaf rate and production quality has certain positive correlation; but there was a certain negative correlation between the yield and quality with the increasing of chlorine content in tobacco plant growth. under90kg/hm2KCL treatment, tobacco leaf yield and output value, average price, the highest proportion of superior tobacco, were2051.3kg/hm2,55383.8yuan/hm2,27.0(yuan/kg),65.0%respectively. The rate of broken leaves of tobacco plant and the average breakage of a blade of maximum amount of135kg/hm2 KCL,58.33%,1.08/strains respectively; the minimum control treatment (without). When the KCL is90kg/hm2, tobacco grade quality of the overall look of ideal and chemical composition are coordinated. Comprehensive above, when the KCL is90kg/hm2, flue-cured tobacco leaf quality and economic value is the most ideal.(3) Within a certain range, boron fertilizer on the growth of tobacco plant, has certain positive correlation relationship between yield and quality of tobacco leaves of tobacco plant, and the rate of leaf has a certain negative relationship. When the amount of borax is22.5kg/hm2, tobacco leaf yield and output value, average price, the highest proportion of superior tobacco, they were2070.0kg/hm2,54648.0yuan/hm2,26.4(yuan/kg),65.0%. The rate of broken leaves of tobacco plant and the average breakage of a piece of leaf of borax content was22.5kg/hm2, minimum25.87%,0.35respectively/strains;. When the borax is22.5kg/hm2, various grades of tobacco appearance quality is ideal and chemical composition is harmonious. Comprehensive above, when the amount of borax is22.5kg/hm, flue-cured tobacco leaf quality and economic value is the most ideal.