文献类型： 外文期刊

作者： Yang, Xiangkun ¹ ; Zhang, Zhanqin ² ; Niu, Yuan ¹ ; Tian, Haiyan ² ; Ma, Fuyu ¹ ;

作者机构： 1.Shihezi Univ, Beisi Rd, Shihezi 832000, Xinjiang, Peoples R China

2.Xinjiang Acad Agr & Reclamat Sci, 221 Wuyi Rd, Shihezi 832000, Xinjiang, Peoples R China

3.Key Lab Xinjiang Prod & Construct Corps Cereal Qu, 221 Wuyi Rd, Shihezi 832000, Xinjiang, Peoples R China

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2017 年 109 卷 6 期

页码：

收录情况： SCI

摘要： A field experiment was conducted to examine the influence of mulch film removal time (10 and 1 d before the first irrigation (T10 and T1, respectively) and 1 d before the second irrigation (E1) aft er emergence) on cotton (Gossypium hirsutum L.) root morphology and dry matter accumulation. The control group (CK) was film mulched throughout the growth stage. In 2015, the respective root length density (RLD), root surface-area density (RSD), and root volume density (RVD) in E1 were highest during the initial flowering stage (IFS, 3537 m m(-3), 3.4819 m(2) m(-3), and 382 cm(3) m(-3)) and blossoming and boll forming stage (BBFS, 2472 m m(-3), 3.1307 m(2) m(-3), and 421 cm(3) m(-3)). Th e maximum root dry matter accumulation was measured in CK (2647 kg ha(-1)). In 2016, which had more rainfall, RLD (1699 m m(-3)) and RSD (2.6877 m(2) m(-3)) in T10 and RVD in T1 (503 cm3 m(-3)) were the highest during IFS. RLD in E1 (2234 m m(-3)), RSD (3.6770 m(2) m(-3)) and RVD (598 cm3 m(-3)) in CK were the highest during BBFS. Th e cotton root/shoot ratio (R/T) was higher in the fi lm-removal treatments than in CK. E1 showed the highest proportion of fi ne roots thinner than 1.0 mm during any stage except for 2015 BBFS. Th e results indicate that fi lm removal at an appropriate time can increase RLD, RSD, and RVD, but it is conducive to the accumulation of root dry matter only in years with lower rainfall.