| Effects of planting density on plant growth and water consumption of Zhongdi77 maize under controlled irrigation |
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| DOI：10.7606/j.issn.1000-7601.2013.02.26 |
| Key Words: yield water consumption controlled irrigation water use efficiency leaf area index |
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| Abstract: |
| Effects of planting density on plant growth and water consumption were studied with Zhongdi77 maize as the test material under controlled irrigation in the western semi arid region of Liaoning province. The results showed that the plant height, stem diameter, leaf area per plant, ear length, axle weight, grains per row, grains per ear and grain weight per ear decreased with the increase of plant density; The ear diameter and rows per ear were influenced very little by planting density; The leaf area index, barren ear tip, daily water consumption, water consumption during each growing stage, and total water consumption increased with the increase of plant density; The total water consumption under the highest density was 28.6% more than that under the lowest density. The regression analysis showed that as the plant density increased, the yield and water use efficiency increased at the beginning and then decreased.
Therefore, for the purpose of saving water and raising grain yield, the suitable density of Zhongdi77 is 6～6.75×104 plants·hm-2 under controlled irrigation in the western semi-arid region of Liaoning Province. |
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