| 摘要: |
| 研究表明,(1)地膜玉米中单2号雄穗和雌穗分化历时分别为 34,26 d时,分化始期的可见叶和叶龄分别为 8.8,6.5和 11.0,7.7。与露地玉米相比,雄穗分化期缩短 16 d,雌穗分化期缩短12人在穗分化的前期和中期,地膜玉米的叶数均显著多于露地玉米。(2)地膜玉米雌雄穗分化期的对应关系与露地玉米基本一致。(3)地膜玉米要求栽培措施比露地玉米早而及时。前期和中期管理的叶龄值比露地王米多1,后期与露地玉米基本一致。(4)地膜玉米各分化期的叶面系数均显著大于露地玉米是其增产的主要原因之一。 |
| 关键词: 地膜玉米,穗分化期,叶龄 |
| DOI： |
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| Corn Ear Differentiation Process in the Fields Mulched with Plastic Sheet |
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Zhang Chi,Zhang Chi
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| Abstract: |
| The studies showed the followings:1. Tassel and ear differentiation periods of corn with plastic sheet mulching-Zhongdan No. 2 went through 34 days and 26 days respectively. At the beginning stage of differentiation,the visidle leaves and leaf age were 8. 8,6. 5 and 8. 9 respectively. In comparison with corn without plastic sheet mulching,the differentiation period for tassels was shortened by 16 days,and for ears by 12 days. In the early and medium stages of ear differentiation, the numbers of leaves of corn with plastic sheet mulching were greater than those of corn wuthout plastic sheet mulching. 2. The corresponding relation of the tassel and ear differentiation period of corn with plastic sheet mulching was basically in agreement with that of corn without plastic sheet mulching. 3. The cultivation of corn with plastic sheet mulching should be earlier and more timely than that of corn without plastic sheet mulching. The leaf age value in early and medium stage management was one larger than that of corn without plastic sheet mulching,but the leaf age value in later stage kept that same as that of corn without plastic sheet mulching. 4. The leaf area coefficient in each differentiation stage of corn with plastic sheet mulching was larger than that of corn without plastic cover, which can be one of the important causes in yield increase |
| Key words: corn with plastic sheet mulching, ear differentiation, leaf age |
