| Effects of cotton planting modes with machine picking on defoliation and fiber quality of different plant types |
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| DOI：10.7606/j.issn.1000-7601.2019.01.11 |
| Key Words: cotton machine picking cotton planting modes defoliation fiber quality spacing pattern |
| Author Name | Affiliation | | Li Jian-wei | Cotton Engineering ResearchCenter, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 | | Wu Peng-hao | Cotton Engineering ResearchCenter, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 | | Xiao Shao-wei | Cotton Engineering ResearchCenter, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 | | Cui Jian-ping | Economic Crop Research Institute of Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091 | | Zhang Ju-song | Cotton Engineering ResearchCenter, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 |
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| Abstract: |
| This study used two types of cottons (loose type Xinluzhong No. 54 and compact type Xinluzhong No. 75) as the test crops and three machine modes in the current field conditions to compare the effects of the planting modes on yield and fiber quality and the relation between structure and defoliation. The results showed that compared with six-lines pattern, the seed cotton yield of Xinluzhong No. 54 with three-lines pattern increased by 7.2% and its lint yield increased by 8.9%. The seed and lint cotton yield of Xinluzhong No. 75 with three-lines pattern decreased by 8.2% while its yield with four-lines patterns decreased slightly. Compared with four-lines pattern and six-lines pattern, the defoliation rate and hanging rate of three-lines pattern were higher. There was a very high negative correlation, r=-0.685, between branch complexity coefficient, α1, and defoliation rate. There was a significant positive correlation, r=0.824, between branch complexity coefficient, α2, and hanging rate. There was no significant correlation between defoliation rate and hanging rate. LAI had no correlation with defoliation rate and hanging rate. There were no obvious differences in fiber quality between three modes. The yield of three-line pattern was the best for Xinluzhong No. 54. Although the yield of six-line and four-line were better, considering effects of defoliation and fiber quality, four-line mode was the best pattern for Xinluzhong No. 75. Therefore, for loose plant type, three-line machine picking planting mode was the best option. But, for compact plant type cultivar, the best machine picking planting node was four-line mode. |
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