| Growth and development of Zhongmai 349 under different irrigation patterns |
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| DOI：10.7606/j.issn.1000-7601.2012.04.09 |
| Key Words: irrigation mode translocation of dry matter grain-filling rate yield components |
| Author Name | Affiliation | | WU Mingan | Xianyang Agricultural Technology Extension & Service Center, Xianyang, Shaanxi 712034, China | | WANG Binlong | Xianyang Agricultural Research Institute, Xianyang, Shaanxi 712034, China | | WEI Yanli | Xianyang Agricultural Research Institute, Xianyang, Shaanxi 712034, China | | LI Ruiguo | Xianyang Agricultural Research Institute, Xianyang, Shaanxi 712034, China | | JIANG Huili | Xianyang Agricultural Research Institute, Xianyang, Shaanxi 712034, China | | ZHANG Ping | Xianyang Agricultural Research Institute, Xianyang, Shaanxi 712034, China | | ZHANG Anjing | Xianyang Agricultural Research Institute, Xianyang, Shaanxi 712034, China |
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| Abstract: |
| The effects of four irrigation patterns on soil water content, translocation of dry matter, grain filling rate, yield and yield components of Zhongmai 349 were studied under the condition of field experiment, with Xiaoyan 22 as the control. The results showed that the soil water content was increased and the translocation of dry matter in vegetative organs and its contribution to filling-grains were decreased. Besides, photosynthetic performance of leaves, and photosynthetic products to grain were increased after flowering
, and grain-filling stage was prolonged, grain-filling rate in the middle and late period was increased, grain weight increased, spike number, grain number per spike, 1000-grain weight and yield also improved after irrigation. In the same mode, the transportation of dry matter and its contribution to grains were much more in Zhongmai 349. In each irrigation mode, the transportation of dry matter and contribution rate to grain decreased much more than control; under the case control, more transportation of dry matter from nutrition organs above the ground to grains was observed in Zhongmai 349, and its contribution to grains was largely increased, thus this could reduce the influence in which source productivity deficiency happened, and the decreasing yield would reduce when water stress was applied than frequent irrigation, it was stronger in drought resistance. The filling rate was higher in the middle developmental stage. There was no significant difference between irrigating twice and three times in Zhongmai 349, but the yield in treatment of irrigation three times was higher. The highest yield among treatments in Xiaoyan 22 was the winter water + jointing water treatment, and being irrigated once, and the yield was higher when water was irrigated at node enlongation stage only. |
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