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| Effect of different planting pattern and irrigation frequency on stalk lodging resistance of winter wheat |
| Liu Zhongqiu, Bian Chengyue, Liu Xinhui, Liu Quanru, Ma Changjian, Li Quanqi |
| College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai′an, Shandong 271018, China |
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Abstract In order to illustrate stalk lodging resistance mechanism in the late growth stages and grain yield of winter wheat, 2 planting patterns,wide-precision planting and conventional cultivation plan-ting, and 3 different irrigation treatments, 120 mm only at jointing stage, 60 mm each at jointing and heading stages, and 40 mm each at jointing, heading and milk stages were conducted to study the effect of wide-precision planting and irrigation frequency on main physical parameters, stalk physical strength, lodging resistance index, yield and yield components of winter wheat. The results indicated that the gravity center of winter wheat decreased with the increasing of irrigation frequency in the hea-ding, milk and dough stages under the condition of irrigating total 120 mm, irrigating three times had significant effect on diameter of basic secondary. The stalk internode physical strengths in the conventional cultivation pattern were significantly larger than the wide-precision pattern, yet the lodging resis-tance indexes with irrigating three times were larger than irrigating once and twice. The stalk internode physical strengths were significantly correlated with fresh mass and the lodging resistance indexes were significantly negative correlation with gravity center. The irrigation frequency of twice had the highest grain yield for both planting patterns. Compared with the conventional cultivation pattern, the wide-precision pattern can increasing yield potential by increasing spike numbers with decreasing irrigation frequency. In summary, the results indicate that the wide-precision with irrigating 60 mm each at join-ting and heading stages of winter wheat should be an effective water-saving planting pattern for improving stalk lodging resistance characteristics and grain yield of winter wheat.
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Received: 18 September 2014
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