| Research on appropriate harvesting time of corn and utilization mode of straw forage |
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| DOI：10.7606/j.issn.1000-7601.2012.03.03 |
| Key Words: yield nutrition, harvesting time straw forage |
| Author Name | Affiliation | | WANG Minling | Northeast Institute of Geography and Agroecology, Chinese Academy of Seiences, Changchun, Jilin 130012, China | | ZHONG Rongzhen | Northeast Institute of Geography and Agroecology, Chinese Academy of Seiences, Changchun, Jilin 130012, China | | ZHOU Daowei | Northeast Institute of Geography and Agroecology, Chinese Academy of Seiences, Changchun, Jilin 130012, China |
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| Abstract: |
| The changes in nutrients of corn at different growing periods, organs, and spatial locations were examined by determining crude protein, in vitro digestibility, and metabolic energy. The results showed that the maximum yield of corn(Zea Mays L.)was 67 531 kg/hm2, which was observed in September 24. Therefore, this is a preferred time to harvest corn. The most total metabolic energy and total crude protein of whole-crop corn were 107 374 MJ/hm2
and 704 kg/hm2, and they were observed in September 4 and 9, respectively. The most total metabolie energy(107 374 MJ/hm2)of whole-erop corn was also observed from September 4~9. So this period should be the optimal time to harvest whole-crop corn as forage. Furthermore, the lower part of the plant had lower erude protein level, and the upper part of the plant had more nutrient content, so the lower and upper parts of plant should be used as fuel and forage feed, respectively. |
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