Journal of Northern Agriculture ›› 2023, Vol. 51 ›› Issue (1): 16-21.doi: 10.12190/j.issn.2096-1197.2023.01.02

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Effects of wide and narrow row planting on photosynthetic characteristics,yield and quality of silage maize

YIN Jianjun, GUO Qingrui, GUO Fengqin, ZHANG Xiaojuan, WANG Li   

  1. High Latitude Crops Institute,Shanxi Agricultural University,Datong 037008,China
  • Received:2022-12-22 Online:2023-02-20 Published:2023-05-22

Abstract: 【Objective】To explore the suitable planting mode for silage maize in the high altitude low temperature areas of northern Shanxi.【Methods】Using the silage maize variety Dajingjiu 23 wildly planted in the high altitude low temperature areas,at the planting density of 75 000 plants/hm2,four wide and narrow row planting modes were set up:65 cm+65 cm,80 cm+50 cm,90 cm+40 cm and 100 cm+30 cm. The chlorophyll content,leaf area index,photosynthetic rate(Pn),yield,plant traits and quality in each key growth period were measured and analyzed.【Results】Under different wide and narrow row planting modes,the photosynthetic indexes,yield and lodging rate under 90 cm+40 cm planting mode were the best,and significantly(P<0.05)different from other planting modes. The quality of silage maize grown in planting modes of 90 cm+40 cm,65 cm+65 cm,and 80 cm+50 cm met the national first level quality standards.【Conclusion】At the planting density of 75 000 plants/hm2,the optimal planting mode for silage maize Dajingjiu23 was 90 cm+40 cm.

Key words: Silage maize, Wide and narrow row planting, Photosynthetic characteristics, Yield, Quality

CLC Number: 

  • S513