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Effect of Chinese Chestnut in Intercropping System on Ecophysiological Factors in Tea Garden

Author: SunLei
Tutor: ZhangTie
School: Anhui Agricultural University
Course: Pomology
Keywords: Tea tree Chestnut Net photosynthetic rate Diurnal variation Canopy density
CLC: S664.2
Type: Master's thesis
Year: 2006
Downloads: 128
Quote: 4
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Abstract

This study investigated the Dabie Mountain area of ??tea photosynthetic characteristics. Early in the growth of tea, Growing Season, growth stage, the use of American-Li-6400 photosynthesis system of measurement and comparative analysis of the mixed tea tree and pure tea tree photosynthesis. Three periods for chestnut photosynthesis the chestnut and single chestnut with tea intercropping system discussed. Research chestnut with tea intercropping Park Oct. eco-climatic factors on the physiology of tea tree. The results showed that: May intercropping tea tree net photosynthetic rate diurnal variation of a single peak curve, the highest peak in 13:00, peak 5.48μmol · m-2 s-1; net photosynthetic rate of tea under 6 month intercropping mode change a single peak curve, the highest peak at 14:00 pm, the peak is 21.75μmol · m-2 s-1; 10 intercropping during the month of tea under diurnal changes in a single peak curve, the highest peak in 12:00 The peak 11.7μmol · m-2 · s-1.'s single mode of tea under diurnal variation of net photosynthetic rate of the bimodal curve, the highest peak at 14:00, the second peak in the afternoon 17:00; peak 13.7μmol · m-2 · s-1, the second peak 11.65μmol · m-2 s-1; June single mode of tea under the diurnal variation of the apparent bimodal curve, the first peak in the morning 10, the peak 14.6μmol · m-2 · s-1; second peak at 15:00 pm, peak 18.2μmol · m-2 s-1; 10 single mode of diurnal variation of net photosynthetic rate of tea tree a single peak curve, the highest peak in 13:00, peak 4.83μmol · m-2 · s-1. The combined effect of environmental factors and stomatal factors \Intercropping tea tree does not appear midday depression, chestnut tea intercropping system to improve the micro-climate is conducive to photosynthesis. Tea seasonal changes: intercropping tea photosynthetic capacity: growth peak gt; growth Final gt; the early growth monoculture tea photosynthetic capacity: growth peak gt; initial stage of growth gt; growth stage. Regression analysis showed that the main factor to affect the photosynthetic rate of tea intercellular CO2 concentration, temperature, photosynthetically active radiation, stomatal conductance, atmospheric CO2 concentration. Different seasons chestnut net photosynthetic rate of the process. The process the intercropping chestnut and single chestnut net photosynthetic rate in May and June are bimodal curve; the intercropping chestnut and single chestnut net photosynthetic rate of the process in October are unimodal curve; photosynthesis of tea tree chestnut no significant effect. May the intercropping chestnut net photosynthetic rate highest peak in 12:00, the peak 2.014μmol · m-2 · s-1, the peak at 16:00 pm, the peak is 0.4025μmol · m-2 · s-1 in June The intercropping chestnut net photosynthetic rate highest peak in the afternoon 14:00, peak 19.74μmol · m-2 · s-1. The second peak appears at 16:00 pm, the peak is 7.33μmol · m-2 · s-1. The chestnut \Chestnut seasonal variation is more complex intercropping chestnut photosynthetic capacity: flowering period gt; result Phase gt; leaf stage, single chestnut photosynthetic capacity: 13:00, the result of gt; flowering Phase gt; Exhibition leaf stage; 13:00 After the flowering period gt; fruiting period gt; leaf expansion. The study found that, compared with open control tea plantation, October shaded by chestnut trees, were significantly lower in each observation period, the air temperature, ground temperature, soil temperature into. Tea garden soil moisture, air humidity was significantly improved.

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