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Study on Canopy Structure、Photosynthesis Production and Nutrients Transfer Characteristics of Cotton in Apricot-cotton Intercropping System

Author: WeiHongGuo
Tutor: ZhangJuSong
School: Xinjiang Agricultural University
Course: Crop Cultivation and Farming System
Keywords: Intercropping cotton Monoculture cotton Photosynthetic production Nutrient Yield Quality
CLC: S562
Type: Master's thesis
Year: 2011
Downloads: 69
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To explore the the South Xinjiang fruit cotton intercropping pattern under the cotton growth and development characteristics, photosynthetic production, nutrient transfer, production and quality, from March 2010 to November 7 in Xinjiang of Kashi City Yuepuhuxian under Bazaar Township village group analysis apricot and cotton intercropping of cotton growth, yield and quality factors, and monoculture and intercropping conditions under cotton photosynthesis, canopy structure, changes in nutrient transfer characteristics of the shoot a more detailed analysis of study designed for grain and cotton fruit cultivation in Xinjiang to provide a theoretical basis. The major test conclusions are as follows: a whole growth period for cotton than monoculture cotton nights 8 d; the main stem Day growth of intercropping cotton to 0.83 cm · d-1, 0.91 cm · d-1, after topping monoculture cotton , plant height intercropping cotton is 58.01 cm, single cotton is 64.51 cm; under intercropping main stem elongation, starting section height rise, fruit branch length, the lower part of intercropping cotton than cotton monoculture, total fruit section ratio 53.47% lower monoculture cotton boll rate is 6.99% lower than the monoculture; Wai bell of the total in the lateral distribution, intercropping cotton boll number 58%, monoculture cotton 67%, vertical distribution of intercropping cotton central 31% cotton, 10% lower than the monoculture Central boll is an important factor in the formation of cotton production; \than that, intercropping cotton LAI before the flowering stage faster growth in intercropping cotton peak flowering stage, value of 4.31 monoculture cotton boll period reached a peak value of 4.63; intercropping cotton monoculture cotton MTA With growth period goes by in the boll period maximum is 50 °, the groups DIFN increases, reducing the photosynthetically active area, thereby reducing the solar energy utilization; intercropping cotton various parts of the bell on the leaf SPAD value were lower than the cotton monoculture; under intercropping conditions, no significant difference in the Pn of cotton monoculture conditions, Ci high, GS, and thus the Evap slow, resulting in low Pn dry matter accumulation, boll weight and yield decreases. 3. Maximum accumulation of intercropping cotton moment (tm) N after emergence 77 d than monoculture cotton late 10 d P2O5 at 79 d than the monoculture cotton nights 4 d, K2O at 76 d than cotton monoculture night 15 d; maximum accumulation rate of intercropping cotton N 3.02 kg · d-1, 33.5% lower than monoculture cotton, P2O5 1.62kg · d-1, 40.4% lower than the monoculture of cotton, K2O 2.06kg · d- lower than the monoculture cotton 58.6%; nutrient accumulation of intercropping cotton duration N 37 d P2O5 for 33 days, K2O 63 d.4 under intercropping reduced cotton lint percentage the term harvest the number of trees to 183,400 strains · hm-2, the number of bolls per plant to 3.6, lint percentage of 38.6%, 1352.84 kg · hm-lint yield, 43.8% lower than the monoculture of cotton; under intercropping, light a little time, low temperature , fiber synthesis slower, less content, decline in quality, lower than the overall intercropping of cotton fiber quality of cotton monoculture cotton.

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