| Comparison of solar and heat energy utilization and grain production of spring corn and multiple cropping silage corn in Northern Xinjiang |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.028 |
| Key Words: Northern Xinjiang silage corn spring sowing multiple sowing dry matter production ecological effect |
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| Abstract: |
| A filed experiment was conducted to compare spring and multiple cropping silage corn regarding grain yield, dry matter accumulation, utilization of solar, heat resources. The results indicated dry matter accumulation of the sowing dates on April 28 th, sown June 30 th, sown July 10 th were 15 615, 17 615, 14 671 kg·hm-2, respectively and those of fresh matter weight 53 988, 67 251, 68 327 kg·hm-2, respectively. Growth duration of multiple cropping silage corn was reduced and photosynthetic active radiation and ≥10℃ accumulated temperature were lower than spring sowing. Seeding stage, heading stage, filling stage of sown June 30 th fell into the optimum range of temperature. LAImax and total photosynthetic potential of sowing dates on April 28 th, sown June 30 th, sown July 10 th reached 5.01, 5.72, 6.36 and 2.45.×106 m2·d-1·hm-2, 2.84×106 m2·d-1·hm-2, 3.37×106 m2·d-1·hm-2, respectively. Multiple cropping silage corn had a higher dry matter accumulation than spring silage maize, because of suitable so
lar and temperature. |
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