| 郭海英,赵建萍,李宗䶮,王宁珍,张谋草,黄斌.陇东紫花苜蓿生物量与气象要素的关系[J].干旱地区农业研究,2006,(5):208~212 |
| 陇东紫花苜蓿生物量与气象要素的关系 |
| Relationship between biomass of alfalfa and meteorological factors in east Gansu |
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| DOI：10.7606/j.issn.1000-7601.2006.05.43 |
| 中文关键词: 紫花苜蓿 生长 气象要素 陇东 |
| 英文关键词:alfalfa growth meteorological factor east Gansu |
| 基金项目:国家自然基金项目(40205005)； 兰州区域气象中心开放实验室项目“农牧区草业生态观测试验及气候对草业生产影响评估方法研究” |
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| 中文摘要: |
| 分析了2年生紫花苜蓿的生长发育规律、地上生长量、地下生长量及气象要素对紫花苜蓿生长发育的影响。结果表明:紫花苜蓿在陇东地区种植气候适应性较好,鲜干比高,适宜青饲。由于初秋热量条件限制,陇东塬区2年生陇东紫花苜蓿第三茬分枝后便停止生长,每茬全生育期需要≥0℃积温约1 100℃~1 150℃;其中萌芽分枝期春季约280℃,夏季约330℃;分枝现蕾期460℃左右;现蕾开花期360℃左右,从第一茬到第三茬,产草量和植株高度依次降低,但分枝数依次增多,显蕾期前后是产量形成的关键时期。 |
| 英文摘要: |
| This article analyzed the growth disciplinarian,the above-ground biomass and the under-ground biomass of alfalfa,and investigated the effects of meteorological factors to the growth of alfalfa.The results showed that alfalfa is suitable well to the climate condition in east Gansu;the ratio of FW/DW is high,and it is favorable for breeding as green forage.Due to the limit of heat energy in early autumn,the third cutting grass ceases growing after divarication period.The requirement of accumulated temperature above 0℃ was about(1 100)℃～1 150℃ in the full growth period of each cutting,thereinto,about 280℃ and 330℃ in sproutingdivarication period in springtime and summertime respectively,about 460℃ in divarication-budding period,and about 360℃ in budding～blooming period.From the first cutting to the third cutting,the yield of alfalfa tends to reduce but the number of divarication tends to increase in turn.Budding period is the key time affecting yield formation. |
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