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| Characteristic Analysis and Verification for High-yielding Corn in China |
| WANG Chongtao1, LI Shaokun2 |
| 1. Business College of Beijing Union University, Beijing 100025, China;2. Key Laboratory of Crop Physiology and Production, Ministry of Agriculture; Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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Abstract: Based on the analysis of typical characteristics and inherent law of high-yielding corn (≥15000kg/hm2)fields in China, the way of breaking through of the yield reaching 15000kg/hm2 and the key technologies are put forward. The results show that harvest ears is the most important factor in yield components factors. Under the conditions of the present production, the optimal yield components mode are planting density per hectare (70755-101250 plants), ear number per hectare (7.01×104-10.09×104 ears), grain number per ear (453-642 grains), 1000-grain weight (323.0-414.9g), kernel weight per ear (162.5-236.2g), and 35°N-44°N can be regarded as corn high-yielding belt of China. Furthermore, the main technical ways for breakthrough of the corn yield are given, including selection of mid-late maturity hybrids with high population tolerant, higher population, wider use of chemical fertilizers to meet nutrient demands, intensive management, delay harvest, creating high-quality population, prolonging accumulating time of dry matter after flowering and increasing transfer rate of organ to grain, and taking full advantage of light-temperature resources.
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Received: 06 May 2013
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2013, Vol. 31 
