共查询到20条相似文献,搜索用时 93 毫秒
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经1993 ̄1996年在定西县试验示范,总结出一整套谷子全生育期地膜覆盖栽培技术,其具体内容包括选茬、施肥、适宜品种、覆膜方式、播种方法、田间管理等技术。 相似文献
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冬小麦生育期间根系脱氢酶活性的初步研究 总被引:7,自引:0,他引:7
用红四氮唑法(TTC法)对冬小麦根系脱氢酶活性进行了系统测定.结果表明:冬小麦的根系脱氢酶活性随生育进程而逐渐降低,可能与新根的比例下降和老根的比例提高有关;施氮较多的处理,各生育时期的根系脱氢酶活性均较高;播期较晚的处理,在返青期前根系脱氢酶活性高于早播处理;不同品种之间的根系脱氢酶活性也存在差异;根系脱氢酶活性与叶片的叶绿素含量呈正相关关系,与籽粒产量也呈正相关关系。文中还对脱氢酶活性作为根系活力指标的可能性及通过栽培措施调控根系和地上部协调发展的重要性进行了讨论。 相似文献
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Photosynthetic Characteristics of a Super High Yield Cultivar of Winter Wheat During Late Growth Period 总被引:3,自引:0,他引:3
The mechanism of high yield of winter wheat in the field at late growth period was investigated by measuring the photosynthetic characteristics of photosystem Ⅱ (PSⅡ) and xanthophylls cycle, which could provide physiological reference for breeding. Weimai 8 (W8), a super high yield cultivar, and Lumai 14 (L14), a control cultivar were object. The photosynthetic rate (Pn), parameters of chlorophyll fluorescence and chlorophyll content were measured. The Pn, maximum photochemical efficiency of PSII (Fv/Fm), quantum yield of PSII electron transport (ΦPSⅡ), efficiency of excitation energy capture by open PSII reaction centers (Fv'/Fm'), and photochemical quenching coefficient (qP) were higher in Weimai 8 compared to that in Lumai 14, a commercial high yield cultivar. Furthermore, Weirnai 8 showed a lower non- photochemical quenching coefficient and a lower de-epoxidized ratio of the xanthophyll cycle pigments than of Lumai 14 at late growth period. At mature stage, chlorophyll content of different leaves decreased both in Weimai 8 and Lumai 14. Chlorophyll content in flag, second and third leaf from the top of plant decreased more in Lumai 14 than in Weimai 8. These results suggested that Weimai 8 had more antenna pigments to absorb light energy, and had higher photosynthetic capability and photochemical efficiency of PSⅡ. The yield of Weimai 8 was also higher than that of Lumai 14. 相似文献
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从政府支持、气候因子影响、种植管理技术3方面分析了2009—2010年山东省禹城市小麦高产的原因,总结了小麦高产的措施,以期为小麦高产提供参考。 相似文献
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以中筋小麦新冬24号为材料,研究了不同时期施氮对小麦产量和品质的影响。结果表明,在总施氮量相等,基肥和追肥各占20%和80%的情况下,小麦产量随追肥时期和追肥方法的不同而有异。在春季一次性追施氮肥中,拔节期追施产量最高,扬花期次之,孕穗期最小;在拔节期追施氮肥情况下,扬花期比孕穗期再追施一次氮肥产量要高。蛋白质含量、湿面筋含量有随追肥时期的推迟而提高的趋势。面团形成时间、面团稳定时间、评价值、面团最大拉伸阻力、拉伸曲线面积有随追肥时期的推迟而降低的趋势。拔节期是实现中筋小麦高产与优质相协调的适宜追氮时期。 相似文献
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