共查询到17条相似文献，搜索用时 125 毫秒
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为提升巴州甜菜的产量和含糖量，推进制糖企业和甜菜种植户双赢，本文从巴州甜菜生产的整地、播种、除草、施肥和采收环节入手，针对巴州甜菜产业生产现状进行了调研分析。调研结果表明，当前巴州甜菜产业区域管理仍存在不规范现象，甜菜产量和含糖量仍有较大的提升空间。巴州甜菜种植已经具备机械化生产的基础条件，产量和含糖量的平衡问题在种植户和企业间日益凸显。完善并提出适用于巴州甜菜生产现状的机械化作业标准可有效提高甜菜产量和含糖量，可为巴州甜菜生产提供理论参考，助力巴州甜菜产业提质增效。 相似文献
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1引言我国甜菜生产机械化落后,特别是收获环节的机械化作业水平低更是不争的事实。如何利用国产机械装备来推进我国甜菜收获机械化发展,是摆在农机人面前的一个重要课题。但是发展什么样的机型来满足实现我国甜菜生产机械化的要求,目前尚没有统一的认识,仍处 相似文献
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Agricultural production has forced researchers to focus on increasing water use efficiency by improving either new drought-tolerant
plant varieties or water management for arid and semi-arid areas under water shortage conditions. A field study was conducted
to determine effects of seasonal deficit irrigation on plant root yield, quality and water use efficiency (WUE) of sugar beet
for a 2-year period in the semi-arid region. Irrigations were applied when approximately 50–55% of the usable soil moisture
was consumed in the effective rooting depth at the full irrigation (FI) treatment. In deficit irrigation treatments, irrigations
were applied at the rates of 75, 50 and 25% of full irrigation treatment on the same day. Irrigation water was applied by
a drip irrigation system. Increasing water deficits resulted in a relatively lower root and white sugar yields. The linear
relationship between evapotranspiration and root yield was obtained. Similarly, WUE was the highest in DI25 irrigation conditions
and the lowest in full irrigation conditions. According to the averaged values of 2 years, yield response factor (k
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) was 0.93 for sugar beet. Sugar beet root quality parameters were influenced by drip irrigation levels in both years. The
results revealed that irrigation of sugar beet with drip irrigation method at 75% level (DI25) had significant benefits in
terms of saved irrigation water and large WUE, indicating a definitive advantage of deficit irrigation under limited water
supply conditions. In an economic viewpoint, 25% saving of irrigation water (DI25) caused 6.1% reduction in the net income. 相似文献
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为解决甜菜联合收获机分离输送过程中甜菜块根含杂率高、损伤率高的问题,设计了一种六行甜菜联合收获机的三级分离输送装置,阐述了该装置的主要结构及工作原理,并确定关键参数。通过对分离输送过程中土壤、甜菜的运动学分析及甜菜在碰撞过程中的能量分析,确定了影响甜菜含杂和损伤效果的主要因素及各因素的试验取值范围。以拨送板转速、杆条式链筛输送速度和橡胶尾筛倾角为试验因素,以含杂率和损伤率为试验指标,进行二次回归正交旋转组合试验,利用Design-Expert 8.0.6软件对试验结果进行分析,得到试验因素与各指标的回归方程。通过响应面分析各因素对评价指标的影响规律,得出优化参数组合为：拨送板转速100.0r/min、杆条式链筛输送速度1.4m/s和橡胶尾筛倾角39.0°。验证试验结果表明,经过三级分离输送后甜菜含杂率为3.4%,损伤率为2.6%,各项指标均符合国家行业标准要求。 相似文献
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R. Mohammadian S.Y. Sadeghian H. Rahimian M. Moghadam 《Agricultural Water Management》2008,95(5):545-552
Dormant seeding refers to sowing spring crop species in fall. In the spring, seedlings start growing and the crop is established before spring sowing is normally completed. A dormant-seeded crop can establish quickly in spring and may escape from early season drought. A study was conducted to compare performances of dormant seeding with early and late spring seeding of sugar beet. Field experiments were carried out in the Khorasn province (NE of Iran) in 2002 and 2003 by growing a bolting resistant variety (BR1). The experiment consisted of a randomized complete block design with four replications. Dormant seeding was subjected to six irrigation treatments in addition to an early and late spring seeding. The first irrigation was applied 0, 10, 20, 30, 40 and 50 days after 60% soil moisture depletion. After harvest, root yield, sugar concentration, white sugar yield, and non-sugar components of the root samples were measured and analyzed. The results of the dormant seeding showed that root yield of sugar beet decreased with increasing delay of irrigation at the early stages of plant growth. High white sugar yield was obtained at dormant seeding without irrigation delay compared to the early seeding. No significant differences were observed for white sugar yield until three and five water withholdings in 2002 and 2003, respectively. In the second year of the experiment (2003), a relatively cold winter induced about 4.5% bolters and reduced plant population with 33% compared to the early and late spring sowing treatments. In general, white sugar yield produced in response to specific irrigation amounts for dormant-seeded treatments was higher compared to early and late seeding. However, dormant seeding cannot yet be recommended as a comprehensive agricultural practice for sugar beet and, therefore, further investigations are required to improve the quality of the beet by both agronomic techniques and new improved varieties. 相似文献
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半干旱区甜菜水分生产函数试验研究 总被引：1，自引：0，他引：1
为了研究甜菜的耗水规律和节水方法以达到在半干旱区大面积推广的目的,在具有典型半干旱区气候特征的甘南县,以不同生育期的土壤水分水平作为控制的纸筒甜菜盆栽试验,对甜菜蒸腾量和产量之间的函数关系和生育期耗水规律进行了研究,得出了不同生育期甜菜蒸腾量和产量之间的函数关系.采用Jensen模型进行了水分生产函数的求解,建立了甜菜的水分生产函数模型.试验结果表明,甜菜各个生育期耗水量从小到大依次是苗期、糖分积累期、叶丛生长期和块根增长期,需水高峰期在7月和8月;水分敏感指数的变化规律与甜菜的耗水规律相一致,叶丛生长期的λ值最大,说明这个时期甜菜对水分的需求特别敏感,应该重点进行补水灌溉. 相似文献
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Recent changes in the simulated potential crop yield and biomass production caused by changes in the temperature and global radiation patterns are examined, using the Crop Growth Monitoring System. The investigated crops are winter wheat, spring barley, maize, winter rapeseed, potato, sugar beet, pulses and sunflower. The period considered is 1976-2005. The research was executed at NUTS2 level. Maize and sugar beet were the crops least affected by changing temperature and global radiation patterns. For the other crops the simulated potential yield remained stable in the majority of regions, while decreasing trends in simulated potential yields prevailed in the remaining regions. The changes appear in a geographical pattern. In Italy and southern central Europe, temperature and radiation change effects are more severe than elsewhere, in these areas potential crop yields of more than three crops significantly decreased. In the UK and some regions in northern Europe the yield potential of various crops increased.In a next step the national yield statistics were analyzed. For a large majority of the countries the yield increases of wheat, barley and to a lesser extent rapeseed are leveling off. Several explanations could be given, however, as the simulated yield potential for these crops decreased in various regions, the changing temperature and radiation patterns may also contribute to the diminishing yield increases or to the stagnation. In more than 50% of the investigated countries the maize, potato and sugar beet yields continue to increase. This can be attributed to improving production techniques, new crop varieties, sometimes in combination with an improving climatic potential. In some regions in northern Europe, yields continue to increase. 相似文献
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4Q-2型甜菜切顶去叶机的设计 总被引：2，自引：0，他引：2
为提高我国糖用甜菜的机械化收获水平,研制了4Q-2型甜菜切顶去叶机。在简述机具的结构与工作原理的基础上,详细介绍机具的主要工作部件传动轴总成、悬挂架总成、单体总成、割刀、分叶地轮和变速箱的设计及特点。 相似文献