Dataset Information

Optimal planting pattern of cotton is regulated by irrigation amount under mulch drip irrigation.

ABSTRACT:

Objective

It is of great importance to explore agronomic management measures for water conservation and cotton yield in arid areas.

Methods

A four-year field experiment was conducted to evaluate cotton yield and soil water consumption under four row spacing configurations (high/low density with 66+10 cm wide, narrow row spacing, RS_66+10H and RS_66+10L; high/low density with 76 cm equal row spacing, RS₇₆H and RS₇₆L) and two irrigation amounts (CI:conventional drip irrigation; LI:limited drip irrigation) during the growing seasons in Shihezi, Xinjiang.

Results

A quadratic relationship was observed between the maximum LAI (LAI_max) and seed yield. Canopy apparent transpiration rate(CAT), daily water consumption intensity (DWCI) and crop evapotranspiration (ET_C) were positively and linearly correlated with LAI. The seed yields, lint yields, and ET_C under CI were 6.6-18.3%,7.1-20.8% and 22.9-32.6%higher than those observed under LI, respectively. The RS_66+10H under CI had the highest seed and lint yields. RS₇₆L had an optimum LAI_max range, which ensured a higher canopy apparent photosynthesis and daily dry matter accumulation and reached the same yield level as RS_66+10H; however, soil water consumption in RS₇₆L was reduced ET_C by 51-60 mm at a depth of 20-60 cm at a radius of 19-38 cm from the cotton row,and water use efficiency increased by 5.6-8.3%compared to RS_66+10H under CI.

Conclusion

A 5.0max<5.5 is optimum for cotton production in northern Xinjiang, and RS₇₆L under CI is recommended for high yield and can further reduce water consumption. Under LI, the seed and lint yield of RS_66+10H were 3.7-6.0% and 4.6-6.9% higher than those of RS₇₆L, respectively. In addition, high-density planting can exploit the potential of soil water to increase cotton yields under water shortage conditions.

SUBMITTER: Zuo W

PROVIDER: S-EPMC10265678 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature

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Publications

Optimal planting pattern of cotton is regulated by irrigation amount under mulch drip irrigation.

Zuo Wenqing W Wu Baojian B Wang Yuxuan Y Xu Shouzhen S Tian Jingshan J Jiu Xingli X Dong Hengyi H Zhang Wangfeng W

Frontiers in plant science 20230530

<h4>Objective</h4>It is of great importance to explore agronomic management measures for water conservation and cotton yield in arid areas.<h4>Methods</h4>A four-year field experiment was conducted to evaluate cotton yield and soil water consumption under four row spacing configurations (high/low density with 66+10 cm wide, narrow row spacing, RS<sub>66+10H</sub> and RS<sub>66+10L</sub>; high/low density with 76 cm equal row spacing, RS<sub>76</sub>H and RS<sub>76</sub>L) and two irrigation amou ...[more]

PMID: 37324720

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Project description:The drip irrigation under mulch has become one of significant supporting technologies for cotton industry development in Xinjiang, and has shown the good economic and ecological benefits. With the rapid development of society and economy in Southern Xinjiang, the conventional mode of large-quota winter and spring irrigation, salt leaching and alkali decreasing is difficult to support sustainable development of land and water resources in Southern Xinjiang. This study tries to adjust soil moisture and salt content regulation mode of massive water salt leaching and drip irrigation under mulch in the non-growing period of cotton field in Southern Xinjiang, explores interannual soil salinity change features of drip irrigation cotton field without winter and spring irrigation, and provides experimental basis for drip irrigation technology under mulch which can reduce and exempt cotton irrigation in winter and spring. According to ET0, the dual-factor complete combination experiment involving 3 irrigating water quotas (I1, I2, I3) and 2 irrigation times (T12, T16) was designed, and 6 treatments were involved in total(I1T12,I2T12,I3T12,I1T16,I2T16 and I3T16). The investigation results of four-year (2012-2015) field positioning experiment showed that, under the condition of "germination under drip irrigation" without winter and spring irrigation, increasing irrigation quota and irrigation times could lower 0-100cm soil salinity accumulation, but the soil salinity accumulation degree was 40-100cm, and less than 0-30cm. In the seedling stage, bud stage, blossom and boll-forming stage, and boll opening stage, the average salinity of 0-100cm soil increased by 39.81%, 31.91%, 26.85% and 29.47%, respectively. Increasing irrigation quota and irrigation times could ease interannual soil salinity accumulation degree of cotton field with drip irrigation under mulch, without winter and spring irrigation. 0-100cm soil salinity before sowing was related to the irrigation quota of cotton in the growing stage of the last year. The larger the irrigation quota was, the smaller the soil salinity before sowing would be. The accumulation amount of soil salinity at the end of growing stage under different treatments was lower than that before sowing. The drip irrigation of cotton under mulch in the growing stage could effectively regulate soil salinity distribution and space-time migration process in the growing stage of cotton. Compared with the beginning of 2012, 0-100cm average soil salinity under 3 irrigation quotas (I1, I2, I3) was 33.66%, 5.60% and 1.24%, respectively. Salt accumulating rates under 12 irrigations and 16 irrigations were 20.66% and 6.33%, respectively. The soil had the risk of salinization when the "germination under drip irrigation" without winter and spring irrigation was used. Such results can provide the reference for prevention and treatment of soil moisture and salt content of cotton field with drip irrigation under mulch in the arid region.

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Dataset Information

Optimal planting pattern of cotton is regulated by irrigation amount under mulch drip irrigation.

Objective

Methods

Results

Conclusion

Publications

Optimal planting pattern of cotton is regulated by irrigation amount under mulch drip irrigation.

Similar Datasets

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