| Effects of rainfall harvesting planting combined with water-saving irrigation on photosynthetic characteristics and yield of spring corn |
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| DOI：10.7606/j.issn.1000-7601.2014.04.014 |
| Key Words: spring corn rainfall harvesting planting combined with water-saving irrigation photosynthetic characteristics chlorophyll relative content yield |
| Author Name | Affiliation | | CHEN Xin1,3, BING Hao-yang2,3, ZHANG Yan2,3, WU Yang2,3, JIA Zhi-kuan2,3, REN Xiao-long3, ZHANG Peng2,3 | (1.西北农林科技大学林学院， 陕西 杨凌 712100； 2.西北农林科技大学农学院， 陕西 杨凌 712100； 3.中国旱区节水农业研究院，农业部西北黄土高原作物生理生态与耕作重点实验室， 陕西 杨凌 712100) |
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| Abstract: |
| Taking spring corn(Zea mays L.) as the tested material, and the traditional irrigation methods (furrow and border irrigation) as the control, a field test was conducted to determine the effects of rainfall harvesting planting combined with water-saving irrigation (RHWI) on chlorophyll relative content (SPAD), photosynthetic parameters in functional leaves and grain yield of spring corn. The results showed that, among the treatments with same irrigation time, the net photosynthetic rate(Pn), transpiration rate(Tr) and stomatal conductance(Gs) of RHWI were increased by 10.57%～16.15%, 4.10%～9.24% and 15.38%～33.33%, respectively, compared with those of
furrow irrigation; they were increased by 11.31%～26.19%, 5.73%～13.56% and 22.73%～47.37%, respectively, compared with those of border irrigation; and they were increased by -0.12%～26.19%, 0.16%～9.95% and -4.35%～25.00%, respectively, compared with those of rainfall harvesting planting (PRH). There was no significant difference for the chlorophyll relative content (SPAD) and instantaneous water use efficiency(WUE) between RHWI and furrow irrigation, border irrigati
on as well as PRH. Compared with furrow irrigation, border irrigation and PRH, the yield of RHWI was increased by 15.45%(P<0.05), 21.85% (P<0.05) and 3.28%, respectively, and the water use efficiency (WUEY) of RHWI was increased by 39.82%(P<0.05), 53.13%(P<0.05) and 4.44%, respectively, under the condition of irrigating 1 time at pre-sowing stage; the yield was increased by 7.06%, 18.42% (P<0.05) and 2.32%, respectively, and the water use efficiency (WUEY) was increased by 28.41%(P<0.05), 39.58%(P<0.05) and 5.09%, respectively, under the condition of irrigating 1 time at flowering stage; the yield was increased by 5.03%, 14.57%(P<0.05) and 5.72%, respectively, and the water use efficiency(WUEY) was increased by 40.23%(P<0.05), 54.70%(P<0.05) and 2.99%, respectively, under the condition of irrigating 1 time at pre-sowing stage and 1 time at flowering stage. It was concluded that RHWI could improve the leaf photosynthetic performance, and significantly promote the grain yield of corn under the condition of less irrigation volume. |
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