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作物学报 ›› 2014, Vol. 40 ›› Issue (04): 731-738.doi: 10.3724/SP.J.1006.2014.00731

• 研究简报 • 上一篇    下一篇

不同土层测墒补灌对小麦旗叶光合特性和干物质积累与分配的影响

郭增江1,于振文1,石玉1,赵俊晔2,张永丽1,王东1   

  1. 1山东农业大学 / 农业部作物生理生态与耕作重点实验室，山东泰安271018; 2 中国农业科学院农业信息研究所，北京 100081
  • 收稿日期:2013-09-04 修回日期:2014-01-12 出版日期:2014-04-12 网络出版日期:2014-02-14
  • 通讯作者: 石玉, E-mail: shiyu@sdau.edu.cn, Tel: 0538-8241484
  • 基金资助:

    研究由国家自然科学基金项目(31171498)和山东省自然科学基金项目(ZR2011CQ014)资助。

Photosynthesis Characteristics of Flag Leaf and Dry Matter Accumulation and Allocation in Winter Wheat under Supplemental Irrigation after Measuring Moisture Content in Different Soil Layers

GUO Zeng-Jiang1,YU Zhen-Wen1,SHI Yu1,*,ZHAO Jun-Ye2,ZHANG Yong-Li1,WANG Dong1   

  1. 1 Shandong Agricultural University / Key Laboratory of Crop Ecophysiology and Farming System, Ministry of Agriculture, Tai’an 271018, China; 2 Institute of Agricultural Information, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2013-09-04 Revised:2014-01-12 Published:2014-04-12 Published online:2014-02-14
  • Contact: 石玉, E-mail: shiyu@sdau.edu.cn, Tel: 0538-8241484

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摘要：

2011—2012和2012—2013年连续2个小麦生长季，在大田条件下，设置0~20 cm (D1)、0~40 cm (D2)、0~60 cm (D3)和0~140 cm (D4) 4个土层测定土壤含水量，以各土层平均土壤相对含水量拔节期65%和开花期70%为目标相对含水量，全生育期不灌溉为对照处理 (D0)，研究依据不同土层的土壤含水量测墒补灌对小麦旗叶光合特性和干物质积累与分配的影响。结果表明：D2的开花期叶面积指数和单位土地面积上旗叶叶面积、开花后7 d和14 d的旗叶净光合速率和实际光化学效率均高于其他处理，而气孔限制值低于其他处理；D2的成熟期干物质积累量、开花后干物质向籽粒的分配量和开花后同化物分配对籽粒的贡献率亦高于其他处理。两年度D2的籽粒产量分别为9367.4 kg hm-2和9727.5 kg hm-2，均显著高于其他处理；同时，D2的水分利用效率高于D0、D3和D4处理，与D1处理无显著差异。因此，于小麦拔节期和开花期依据0~40 cm土层的土壤含水量测墒补灌是同步实现高产和高水分利用效率的有效措施。

关键词: 小麦;, 测墒补灌, 光合特性, 干物质积累与分配, 籽粒产量

Abstract:

This study aimed to propose a suitable soil layer depth used in determining the irrigation amount. A field experiment was conducted in the 2011–2012 and 2012–2013 wheat growing seasons to study the effects of supplemental irrigation based on the measurement of soil moisture contents on photosynthesis of flag leaves and dry matter accumulation and allocation. Four irrigation treatments were designed with target soil moisture of 65% at jointing and 70% at anthesis in 0–20 (D1), 0–40 (D2), 0–60 (D3), and 0–140 cm (D4) soil layers. Zero-irrigation (D0) was used as the control. D2 was superior to other treatments with higher values of leaf area index (LAI) and flag leaf area on one square meter land at anthesis, photosynthetic rate (Pn) and actual photochemical efficiency (ΦPSII) at seven and fourteen days after anthesis; whereas, the stomatal limitation (Ls) of D2 was lower than that of other treatments. Compared with other treatments, D2 had larger dry matter accumulation at maturity, more dry matter allocated in grains, and higher contribution ratio of dry matter from vegetative organs to grain after anthesis. The grain yield in D2 was 9367.4 kg ha-1 in 2011–2012 growing season and 9727.5 kg ha-1 in 2012–2013 growing season, which were significantly higher than those in other treatments. The water use efficiency of D2 was significantly higher than that of D0, D3, and D4, but with out significant difference to that of D1. To obtain both high yield and high water use efficiency, we suggest the optimal soil layer for measuring moisture content is 0–40 cm, and supplementary water should be given at jointing and anthesis based on measured soil moisture.

Key words: Winter wheat, upplemental irrigation based on measurement of moisture content, Photosynthesis characteristics, Dry matter accumulation and allocation, Grain yield

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