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生物可降解地膜对土壤肥力及马铃薯产量的影响 总被引:5,自引:0,他引:5
以‘紫花白’为试验材料,设置裸地(对照)、聚乙烯塑料地膜覆盖、生物可降解A膜覆盖、玉米秸秆覆盖、生物可降解B膜覆盖5种覆盖栽培方式,分别于苗期、块茎形成期、块茎膨大期、淀粉积累期、成熟期采集0~20cm土层土样,于成熟期称量马铃薯块茎重量、测定土壤肥力及计算马铃薯产量,研究不同生物降解地膜对土壤肥力及马铃薯产量的影响。结果表明,生物可降解A膜、玉米秸秆、生物可降解B膜覆盖均可增加土层肥力,其中生物可降解B膜覆盖效果最为显著,可提高土壤有机质2.51 g/kg、碱解氮7.24 mg/kg、有效磷16.05 mg/kg、速效钾9.68 mg/kg。各覆盖处理与裸地相比较,马铃薯块茎产量增加了6.25%、21.18%、17.07%、31.71%。因此,采用生物可降解地膜覆盖可以改善土壤肥力状况,提高马铃薯产量,且以生物可降解B膜覆盖效果最好。 相似文献
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马铃薯对硒的吸收及生物富集规律 总被引:3,自引:1,他引:2
分析了不同马铃薯品种(系)和马铃薯采集地土壤中的硒含量,研究了不同马铃薯品种(系)对硒元素的吸收及富集情况。结果表明:不同品种(系)马铃薯的硒累积量具有很大差异,品系‘0602-65’的硒积累量明显高于其他品种;不同品种(系)马铃薯对硒的吸收富集能力差异较大,品系‘0602-65’对硒的富集能力最强,其次为品系‘09012-74’;对不同器官马铃薯的研究结果显示,马铃薯不同器官对硒的吸收富集能力也不同,其富集规律为茎>叶>根>块茎,马铃薯的茎干部位对硒的吸收能力较强,硒元素主要富集在马铃薯的茎干部位。 相似文献
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生物源农药防治马铃薯晚疫病研究进展 总被引:2,自引:0,他引:2
生物源农药为马铃薯晚疫病的无公害防治提供了一条充满希望的途径,大量的研究表明,紫茎泽兰、漏芦、板蓝根、紫苏、苦参、诃子、五倍子、知母、大蒜等几十种植物的有机溶剂提取物或水提取物中含有抑制晚疫病菌生长、延缓病害发展进程的活性成分;YX拟青霉菌、P.fluorescens、假单孢菌、嗜线虫致病杆菌及生防菌B9601等菌株或其代谢物具有杀菌活性,可进行更深入的研究或在生产中加以利用。同时,对生物源农药研究和利用过程中存在的问题及其克服途径进行了探讨,并就其发展方向提出建议。 相似文献
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油菜作为生物柴油原料的研究进展 总被引:9,自引:0,他引:9
针对我国石油资源有限,将长期依赖进口的国情,我国应立足于本国原料,大规模生产替代液体燃料——生物柴油。论述了生物柴油的发展现状、生物柴油的特点,认为生物柴油发展前景广阔;从油菜作为生物柴油的优势,认为油菜是生物柴油最理想的原料。国内外生物技术的突破性进展,显示了运用基因工程可以改良创制“能源油菜”。并对我国目前发展油菜生物柴油存在的问题,提出相应的对策。 相似文献
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Tuber shape is a genetically determined, important varietal characteristic that is also influenced by environmental factors.
In this study, the overall dimensions of tubers of two potato cultivars (Van Gogh and Yukon Gold) were determined using a
triaxial ellipsoid model that was found to encompass the main varietal differences. The more detailed surface features were
captured using a spherical-harmonics series representation for the residual undulation. The method was then applied to four
additional cultivars (Bellona, Lady Rosetta, Pito, and Sabina). Modelling the undulation of tuber surface in addition to the
overall dimensions indicated that cultivars differed in the global shape and, in specific cases, also in the surface undulation
of tubers. The new, improved method for modelling tuber shapes can thus capture and distinguish the overall three-dimensional
shape and irregularities caused by growth conditions and other factors. It is envisaged to be useful for quantitative genetics
approaches aiming to resolve the relative impact of different genes on tuber shape, as well as for various machine vision
and other applications. 相似文献
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影响马铃薯块茎品质性状的环境因子分析 总被引:1,自引:0,他引:1
马铃薯品质主要取决于块茎成分及其含量,包括淀粉、蛋白质、糖和维生素等。块茎内各成分的含量除受遗传基础和生理特性控制外,还主要因自然生态环境条件和人为栽培因素的不同而发生变化。本文主要介绍了影响马铃薯品质性状的光照、温度、水分、土壤特性等自然生态环境因素,以及种植密度、肥料、病虫害等人为栽培因素。通过对影响马铃薯块茎品质性状的生态条件和栽培因素的分析,进一步了解块茎品质与环境因子的相互关系和作用机理,为马铃薯引种工作提供一定的科学依据。 相似文献
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Potato processing in India has shown a tremendous growth in the recent past, creating a proportionate increase in demand for
processing quality potatoes. Reliable annual demand estimates of processing quality potato tubers in India were not available;
hence, the current study was undertaken to provide such estimates. The study was based on a survey of 442 households in the
state Maharashtra in India, which was regarded to be representative for India in the consumption of processed potato products.
The annual expenditure on potato products during 2006–2007 in Maharashtra was estimated to be INR 5,254 million (€ 93.82 million),
which was equivalent to 28,148 Mg of physical processed potato products and 83,333 Mg of processing quality potato tubers
(0.38% of national potato production during 2006–2007, i.e. 22.09 million Mg). When the estimates were generalised to a national
level, the requirement of processing-quality potato tubers in 2006–2007 was equal to 4.04% of national potato production.
The forecasted annual demand of potato products in Maharashtra during 2011–2012 was 75,375 Mg and the corresponding demand
of processing quality potato tubers was 230,760 Mg (0.75% of the estimated national potato production during 2011–2012, i.e.
30.89 million Mg). When generalised at national level, the demand of processing quality potato tubers during 2011–2012 was
found to be 8% of the estimated national potato production. 相似文献
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