| 摘要: |
| 【目的】研究不同施肥量、品种对西藏林芝春青稞增产潜力的影响，筛选适合林芝地区生态条件的青稞品种并确定相应的施肥量。【方法】以藏青320、藏青690、喜马拉雅19、藏青2000和喜马拉雅22为供试品种，设置5种施肥量，研究春青稞各生育时期叶绿素含量、株高、地上部干（鲜）质量及有效穗数、分蘖能力、成穗率和产量的变化。【结果】1)增加施肥量可不同程度提高叶绿素含量，喜马拉雅22各生育期（除苗期外）叶绿素含量均高于其余品种，藏青2000叶绿素含量苗期高于其余品种。2）施肥量增加可提高春青稞的分蘖能力和成穗率，藏青2000和喜马拉雅22的分蘖能力和成穗率高于其余品种。3）F5的株高、地上部鲜质量和干质量均高于F1，孕穗期和抽穗期藏青2000的株高和地上部干质量高于其余品种，喜马拉雅22各生育时期的地上部鲜质量都高于其余品种。4）藏青2000在F4施肥量下平均产量最高，为3 782 kg/hm2，喜马拉雅22和藏青2000在F3施肥量下的平均产量分别是3 649和3 618 kg/hm2。【结论】藏青2000和喜马拉雅22的增产潜力高于其余品种，适宜在林芝地区推广，建议施肥量为（150～225） kg/hm2 N+（90～135） kg/hm2 P2O5。 |
| 关键词: 施肥量 春青稞品种 增产潜力 西藏林芝 |
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| 基金项目:“十二五”农村领域国家科技计划项目(2013BAD30B01) |
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| Effect of fertilization rate and variety on yield increase potential of spring barley in Linzhi,Tibet |
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LI Ping,ZHUO Ga,WEI Zexiu
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| Abstract: |
| 【Objective】The effects of fertilizer rate and variety on yield increase potential of spring barley were studied to determine suit barley varieties and optimal fertilization rates in Linzhi,Tibet.【Method】Field experiments were conducted with two factors of spring barley variety and fertilization rate.Five barley varieties (Zangqing 320,Zangqing 690,Ximalaya 19,Zangqing 2000 and Ximalaya 22) and five fertilization rates were tested.The differences in chlorophyll content,plant height,fresh weight and dry weight at different growing periods,effective panicle number,tillering ability,and yield were studied.【Result】1) Increasing fertilization rate increased chlorophyll content.Ximalaya 22 had higher chlorophyll content than other varieties at every growth period except for seedling period,while Zangqing 2000 had the highest chlorophyll content at seedling stage.2) Increasing fertilization rate improved barley tillering ability and spike rate.The tillering ability and spike rate of Zangqing 2000 and Ximalaya 22 were higher than those of other varieties.3) The plant height,fresh weight and dry weight under high fertilization rate (F5) were higher than under F1,the plant height and dry weight of Zangqing 2000 at booting and heading periods were higher than those of other varieties,and the fresh weight of Ximalaya 22 was the highest at every stage.4) The highest average yield of 3 782 kg/hm2 was obtained by Zangqing 2000 in F4,followed by 3 649 and 3 618 kg/hm2 for Himalaya 22 and Zangqing 2000 in F3.【Conclusion】The potential yields of Zangqing 2000 and Ximalaya 22 were higher than other varieties,and they were suitable for promotion in Linzhi with recommended fertilization rate of (150-225) kg/hm2 N and (90-135) kg/hm2 P2O5. |
| Key words: fertilization rate barley variety yield potential Linzhi,Tibet |
