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Acta Agron Sin ›› 2013, Vol. 39 ›› Issue (05): 885-895.doi: 10.3724/SP.J.1006.2013.00885

• TILLAGE & CULTIVATION·PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Effect of Number and Interspace of Planting Rows on Population and Individual Quality of Strip-Drilling Wheat

ZHENG Ting,FAN Gao-Qiong*,CHEN Yi,LI Jin-Gang,RONG Xiao-Jiao,LI Guo-Rui,YANG Wen-Yu   

  1. Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture / College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
  • Received:2012-08-01 Revised:2012-12-07 Online:2013-05-12 Published:2013-01-28
  • Contact: 樊高琼, E-mail:fangao20056@126.com,Tel: 028-86290972 E-mail:wujueqi2010@yahoo.cn

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Abstract:

Winter wheat is widely planted in the hilly regions in southwest china, mainly in strip-relay-intercropping system. Wheat land is traditionally prepared in strips containing five equidistant rows. The objective of this study was to optimize the number and interspace of planting rows for land preparation using machines in the hilly regions in Sichuan Province, China. A two-year field experiment was carried out, using two plant-type cultivars, Chuannong 27 of the compact-short type and Mianmai 367 of the intermediate type. Under fixed strip width (2m) and planting density (150×104ha-1), six planting patterns were compared, which were traditional pattern (CK), three-row with 30cm+30cm intervals (F3-1), three-row with 35cm+35cm intervals (F3-2), three-row with 40cm+40cm intervals (F3-3), four-row with 20cm+20cm+20cm intervals (F4-1), four-row with 20cm+30cm+20cm intervals (F4-2), and four-row with 20 cm+40 cm+20 cm intervals (F4-3). The field aeration light transmission condition and quality of population and individual were surveyed at different growth stages.The results indicated that reduction of row number per strip and increase of row spacing resulted in higher light transmission rate at the top and basal parts of plant population at booting stage, and the circulation of air reinforced. With the improved aeration and light transmission condition, quality of population and individual and yield significantly increased, but those of edge row almost remained unchanged, thus the border advantage was cut down. Meanwhile, the related quality index of inner row showed that, spike setting rate and effective spike number increased, furthermore, the decline rate of leaf area greatly decreased from booting to milky stage, besides, the accumulation of dry weight increased, and then, grain per spike, spike weight and yield increased. Finally,higher yields were obtained in treatmentsF3-3 and F4-3 compared to CK. Therefore, treatments F3-3 or F4-3 had the optimum number and interspace of planting rows for mechanical sowing strip wheat in these regions. In addition, the yield of F3-2 and F4-2 was equivalent to that of CK, but most indexes of individual quality of inner rows were better than those of CK, so F3-2 and F4-2 could replace the traditional double-three-zero strip planting pattern, too.

Key words: Number and interspace of planting row, Strip drilling, Wheat, Population and individual quality

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