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Studies on Calcium Nutrition of High-quality Flue-cured Tobacco Production in Fujian Province

Author: ZouWenTong
Tutor: XiongDeZhong
School: Fujian Agriculture and Forestry University
Course: Plant Nutrition
Keywords: Fujian tobacco Quality tobacco Soil exchangeable Ca Calcium nutrition Rational fertilization
CLC: S572
Type: Master's thesis
Year: 2008
Downloads: 12
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Abstract

In this study, soil column leaching simulation test, a combination of indoor cultivation test, pot experiment, field trials, field survey method to study the law of leaching of calcium fertilizers, soil adsorption of calcium fertilizer fixed characteristics of tobacco soil exchange abundance and deficiency index of the calcium content and calcium content of the tobacco suitable indicators, flue-cured tobacco rational application of calcium fertilizers, Fujian tobacco soil for calcium evaluation. Soil column leaching experiment shows different soil calcium leaching rate, the soil calcium leaching rate of the size of Wong Nai Tin (16.05%)> tide sands (12.03%)> clayey soil (11.22% ). Calcium fertilizer in clayey soil, yellow clayey soil, tidal sand Tanaka leaching rate was 5.45%, 8.50% and 10.89%, respectively. The soil cultivation test results show that calcium nitrate was applied to three different types of soil, 90 days after soil adsorption fixed rate of fertilizer calcium Sort: clayey soil (55.28%) the HuangNitian (47.57%)> tidal sands (39.31 %). Experimental results show that, in case applied into the same amount of nitric acid calcium fertilizer was applied in the the stucco field and tidal sand field soil, potassium nitrate, potassium chloride and potassium sulfate fertilizer influence the size of the effectiveness of calcium in the soil: nitrate potassium potassium chloride potassium persulfate; in stucco ST tide sand field soil, in the case of calcium fertilizer applied into the same amount of nitric acid was applied on the soil, calcium potassium sulfate and magnesium sulfate fertilizer effectiveness size: magnesium sulfate, potassium sulfate. Soil exchangeable calcium content of flue-cured tobacco studies have shown that the absorption of calcium, ammonium acetate exchange - atomic absorption spectrophotometry spectrophotometric determination of soil exchangeable calcium content and tobacco, smoke root, tobacco stems and whole plant calcium uptake there is a good correlation, the correlation coefficients were 0.993,0.994,0.985 and 0.995 were highly significant positive correlation (0.01 r = 0.834). 4 pot experiment results show that 35 days after transplanting tobacco seedlings, soil exchangeable calcium content of 370.23mg.kg ^{-1 (Ca1) 436.22mg.kg ^{-1 -1 (Ca3) processing, number of leaves at least (6.0 / plant), the calcium content of the soil exchangeable for 939.92mg.kg ^{-1 (Ca6), 1142.33mg.kg ^{-1 (Ca7) deal with the most number of leaves (8.0 / plant), soil exchangeable Ca content 1540.21mg.kg ^{-1 (of CA8 processing) smoke Zhu Zhu girth, number of leaves than Ca7 processing less. CA1 processing of chlorophyll a, chlorophyll b and carotenoids were the lowest, the difference was significant or very significant level and Ca7 processing. The Ca7 processing of flue-cured tobacco leaves lowest MDA content (4.60nmol.g ^{-1 FW), Ca1 treatment, the CA8 treatment differences were very significant level. Tobacco leaf nitrogen content of 0.18 to 0.57 percentage points; CA8 processing (2.17%), the other processing tobacco leaf nitrogen than Ca8 treatment to reduce phosphorus content of tobacco the Ca1 processing (0.26%), other processing tobacco phosphorus content than Ca1 low of 0.05 to 0.07 percentage points; potassium content of tobacco processing by Ca6 (2.02%), other processing compared Ca6 the processing of 0.09 to 0.48 percentage points less. Based on physiological and biochemical indexes of tobacco plants in each treatment prosperous long-term indicators of relative biomass and nutrient absorption conditions, division of tobacco soil exchangeable Ca content of abundance and deficiency index may be more reasonable. This initial proposed: soil exchangeable calcium content of less than 400mg.kg ^{-1 calcium deficiency (CA1 treatment of biomass for 52.63% of the maximum biomass). Soil exchangeable calcium content 400mg.kg ^{-1 700mg.kg ^{-1 for the potential of calcium (Ca2, Ca3, CA4 processing of biomass were maximum biomass 64.17%, 70.74% and 70.10%). Soil exchangeable calcium content 700mg.kg ^{-1 1200mg.kg ^{-1 as appropriate (Ca5, CA6, Ca7,, processing biomass were 83.00% of the maximum biomass , 86.07%, 100%). Soil exchangeable calcium content greater than 1200mg.kg ^{-1 for the rich. 1.30% ~ 1.50% the potential calcium, 1.50% to 1.70% for the right amount of soil exchangeable calcium content and Ca content vigorous upper leaves condition initially proposed: the vigorous upper leaves the Ca content of ≤ 1.30% calcium deficiency > 1.70% rich. Tobacco Field tests showed that with the increase in applied calcium in the soil exchangeable calcium content (exchangeable calcium content of 827.16mg.kg ^{-1 ) soil fertility postponement of ; tobacco seedlings budding stage, processing agronomic traits better application of calcium fertilizers treatment (treatment A), plant height, stem girth, the effective number of leaves, maximum leaf length and maximum leaf width 107.1cm, 10.8 cm, 18.6 pieces / plant, 81.Ocm and 34.8cm. Flue-cured tobacco production, output value and average price at the highest application of calcium fertilizers treatment (treatment A), respectively 3201.15kg.hm ^{-2 , $ 36493.35 hm ^{-2 and 11.40 yuan kg ^{-1 . Exchangeable calcium content of 827.16mg.kg ^{-1 soil should not be applying dolomite powder. 2222 Fujian tobacco representative soil analyzed by HPLC: the province's tobacco-growing areas of soil exchangeable calcium content in 42.70mg.kg ^{-1 ~ 1820.80mg.kg ^{-1 , with an average content of 522.03mg.kg ^{-1 . Judging from the three major tobacco-growing areas of the province the average content of soil exchangeable Ca, Sanming City (555.40 mg.kg ^{-1 )> Nanping City (498.88 mg.kg ^{-1 )> Longyan City (489.72mg.kg ^{-1 ). There are three major tobacco-growing areas in Fujian soil calcium deficiency phenomenon, Longyan, Nanping, Sanming soil calcium deficiency rates were 41.75%, 31.59% and 32.05%.}}}}}}}}}}}}}}}}}}}}}}}

Studies on Calcium Nutrition of High-quality Flue-cured Tobacco Production in Fujian Province

Abstract

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