| Yield characteristics of spring maize with super-high yield in the irrigatable semiarid area of Hebei |
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| DOI：10.7606/j.issn.1000-7601.2011.01.30 |
| Key Words: maize three-combination structure super-high yield semiarid area |
| Author Name | Affiliation | | LU Aizhi | Agronomy Department, Hebei North University, Zhangjiakou, Hebei 075131, China | | DING Chengfang | Agronomy Department, Hebei North University, Zhangjiakou, Hebei 075131, China | | WANG Xiaobo | Institute of Crop and Germplasm Resources, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | WANG Meiyun | Institute of Crop and Germplasm Resources, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | ZHAO Ming | Institute of Crop and Germplasm Resources, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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| Abstract: |
| The theory of three-combination structure was composed in yield components, photosynthetic characteristics and source sink characteristics. On the basis of the three combination structures, a field trial was conducted to reveal the relationship among photosynthetic characteristics and yield component factors and yield potential of Denghai 601 hybrid with high yield potential beyond 18 450 kg/hm2 in the rain-fed and compensatory irrigation farming region of northwest Hebei province. The results showed that the variety was tolerant in density. Plant density was 91 800 plant/hm2. Mean leaf area index (mLAI) was 4.22, which was high in the stage of economic yield shaping. Averag
e net assimilation rate(mNAR) was 5.54 g/(m2·d). The harvest index was 0.53. The number of grains of every ear was 528. The weight of thousand of grains was 384.75 g. In the three combination structure, at the meantime, yield components and photosynthetic characteristics should play an important role in yield. |
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