中国农业科学 ›› 2025, Vol. 58 ›› Issue (12): 2346-2357.doi: 10.3864/j.issn.0578-1752.2025.12.006

• 耕作栽培·生理生化·农业信息技术 • 上一篇    下一篇

播种方式对种子萌发环境及棉花出苗、生长的影响

董明(), 祁虹(), 张谦, 王燕, 王树林, 冯国艺, 梁青龙, 郭宝生   

  1. 河北省农林科学院棉花研究所/农业农村部黄淮海半干旱区棉花生物学与遗传育种重点实验室/国家棉花改良中心河北分中心,石家庄 050051
  • 收稿日期:2025-01-09 接受日期:2025-04-24 出版日期:2025-06-19 发布日期:2025-06-19
  • 通信作者:
    祁虹,E-mail:
  • 联系方式: 董明,E-mail:dddongming@126.com。
  • 基金资助:
    国家棉花产业技术体系(CARS-15-18); 河北省自然科学基金(C2022503008); 河北省农林科学院科技创新专项课题(2022KJCXZX-MHS-6)

The Impact of Sowing Methods on the Seed Germination Environment and Cotton Emergence and Growth

DONG Ming(), QI Hong(), ZHANG Qian, WANG Yan, WANG ShuLin, FENG GuoYi, LIANG QingLong, GUO BaoSheng   

  1. Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences/Key Laboratory of Cotton Biology and Genetic Breeding in Huanghuaihai Semi-Arid Region, Ministry of Agriculture and Rural Affairs/Hebei Branch of National Cotton Improvement Center, Shijiazhuang 050051
  • Received:2025-01-09 Accepted:2025-04-24 Published:2025-06-19 Online:2025-06-19

摘要:

【目的】黄河流域棉区现行播后覆膜技术依赖人工放苗定苗,制约全程机械化发展。探究西北内陆棉区干播湿出技术在黄河流域的适应性,通过比较不同播种方式对种子萌发环境及棉花出苗率、苗期生长的影响,揭示关键环境制约因素,为机械化种植棉花技术优化提供理论支撑。【方法】于2023—2024年以冀863为供试材料,设置露地单粒直播(T1)、单粒播后覆膜(T2)、干播湿出单粒播种(T3)、干播湿出双粒播种(T4)4个试验处理,在河北省曲周县研究不同播种方式对土壤环境、棉花出苗、棉花地上部和根系生长变化的影响。【结果】相较于露地单粒直播,单粒播后覆膜、干播湿出单粒播种的土壤5 cm处地温、土壤含水量、出苗率、株高、地上部干物质重、根系长度、表面积、体积和根系活力显著增加,土壤紧实度、出苗天数和根系直径显著降低;相较于单粒播后覆膜,2023和2024年干播湿出单粒播种的播种30 d内土壤5 cm处地温日较差分别显著降低3.67和1.58 ℃,播种10 d内土壤紧实度分别显著降低9.36%和27.06%,出苗天数在2024年显著降低0.6 d,根系长度、表面积、体积和根系活力在2023和2024年显著增加;相较于干播湿出双粒播种,2023和2024年单粒播种的出苗时间显著增加、出苗率显著降低,但地上部干物质重显著增加13.98%和55.00%。结构方程模型结果表明,不同播种方式通过改变土壤5 cm处地温、5 cm处地温日较差、土壤含水量和土壤紧实度影响棉花出苗率,而苗期干物质重则主要受到土壤含水量、株高和土壤紧实度的直接影响。【结论】在黄河流域棉区,干播湿出通过降低土壤5 cm处地温日较差和土壤紧实度来提高出苗速度和出苗率,促进苗齐、苗壮,以每穴播种1粒种子为最优。

关键词: 棉花, 播种方式, 干播湿出, 出苗率, 苗期生长

Abstract:

【Objective】The current post-planting film-covering technology in the Yellow River Basin cotton-growing areas relies on manual seedling release and thinning, which hinders the development of full-scale mechanization. This study explored the adaptability of the dry sowing and wet emergence technology (used in northwestern inland cotton regions) to the Yellow River Basin. By comparing the effects of different sowing methods on seed germination environment, cotton emergence rate, and seedling growth, this study aimed to identify key environmental constraints and provide the theoretical support for optimizing mechanized planting techniques. 【Method】From 2023 to 2024, using the cotton cultivar Ji863 as the experimental material, four treatments were implemented: single-seed seeding without mulching (T1), single-seed post-planting film covering (T2), dry sowing and wet emergence with single-seed sowing (T3), and dry sowing and wet emergence with double-seed sowing (T4). The study was conducted in Quzhou County, Hebei Province, and the effects of these treatments on soil environment, cotton emergence, and growth of above-ground and root systems were evaluated. 【Result】Compared with T1, T2 and T3 significantly increased soil temperature at 5 cm, soil moisture content, emergence rate, plant height, above-ground dry matter weight, root length, root surface area, root volume, and root vigor, while significantly reduced soil compaction, emergence time, and root diameter. Compared with T2, in 2023 and 2024, T3 reduced the daily temperature range at 5 cm soil depth by 3.67 and 1.58 ℃ within 30 days after sowing, and reduced soil compaction by 9.36% and 27.06% within 10 days after sowing, respectively, which decreased emergence days in 2024 by 0.6 days, and increased root length, surface area, volume, and root activity in both years. Compared with T4, single-grain sowing in 2023 and 2024 significantly increased emergence time and decreased emergence rate but increased aboveground dry matter weight by 13.98% and 55.00%. The structural equation model showed that different sowing methods affected cotton seedling emergence rate by altering soil temperature at 5 cm depth, daily temperature range, soil moisture content, and soil compaction, while seedling dry matter weight was mainly affected by soil moisture content, plant height, and soil compaction. 【Conclusion】In the Yellow River Basin cotton areas, the dry-sowing and wet-emergence improved emergence speed and rate by reducing the diurnal temperature fluctuation at 5 cm and soil compaction, thereby promoting uniform and robust seedlings, and sowing one seed per hole was the optimal strategy.

Key words: cotton, sowing method, dry sowing with wet emergence, emergence rate, seedling growth