| Effects of different row spacing on the growth and photosynthetic characteristics of machine picked cotton |
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| DOI：10.7606/j.issn.1000-7601.2022.05.17 |
| Key Words: machine picked cotton row spacing growth period dry matter accumulation yield |
| Author Name | Affiliation | | ZHANG Wen | Agricultural Science Research Institute of the Seventh Division of Xinjiang Production and Construction Crops, Kuitun, Xinjiang 833200, China | | LIU Quanyi | Agricultural Science Research Institute of the Seventh Division of Xinjiang Production and Construction Crops, Kuitun, Xinjiang 833200, China | | ZENG Qingtao | Agricultural Science Research Institute of the Seventh Division of Xinjiang Production and Construction Crops, Kuitun, Xinjiang 833200, China | | WANG Zhengyang | Agricultural Science Research Institute of the Seventh Division of Xinjiang Production and Construction Crops, Kuitun, Xinjiang 833200, China | | FENG Yang | Agricultural Science Research Institute of the Seventh Division of Xinjiang Production and Construction Crops, Kuitun, Xinjiang 833200, China | | LU Tao | Agricultural Science Research Institute of the Seventh Division of Xinjiang Production and Construction Crops, Kuitun, Xinjiang 833200, China |
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| Abstract: |
| This experiment used the cotton varieties Z1112 and Zhongmian 641 as test materials recommended by the Seventh Division of Xinjiang Production and Construction Corps in Huyanghe City. Three row spacing configuration modes of six rows with one film, four rows with one film and three rows with one film were set up to study the effects of different row spacing configuration modes on cotton growth and photosynthetic characteristics. The results showed that the growth period of three rows with one film was 2~6 days shorter than that of six rows with one film and four rows with one film, the plant height was 7.3 cm and 6.8 cm higher than that of six rows with one film and four rows with one film, and the number of fruit branches was 1.1 and 0.8 more than that of six rows with one film and four rows with one film, respectively. The position and height of initial fruit node were less affected by row spacing configuration. LAI of cotton increased gradually with the advance of growth period from seedling stage to early boll filling stage. The LAI of each treatment gradually began to decrease after entering the full boll period. Under different row spacing configuration modes, the LAI of Z1112 and Zhongmian 641 generally showed a trend of six rows of one film > four rows of one film > three rows of one film. The SPAD value of cotton leaves of all treatments increased first and then decreased from bud to boll opening. In the early growth stage, the SPAD value and dry matter accumulation of cotton leaves decreased with the increase of row spacing. In the late growth stage, the SPAD value and dry matter accumulation of three rows with one film configuration mode increased rapidly, which was higher than that of six rows with one film and four rows with one film configuration mode. The number of bolls per plant, the boll weight and the seed index increased with the increase of row spacing. The number of bolls per plant, the boll weight and the seed index increased by 4.9 and 2.7 per plant, 0.5 g and 0.4 g, 0.7 g and 0.4 g, respectively, compared with the six rows with one film and four rows with one film. However, the total boll number, yield and lint percentage of cotton were less affected by row spacing. Based on comprehensive consideration, the configuration of three rows with one film can be a better mode in terms of speeding up the growth process, increasing the plant height and the number of fruit branches, improving photosynthesis, and maintaining a higher yield. Therefore, it should be promoted. |
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