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对“十五”期间我国农机化技术发展方向与重点的思考 总被引:6,自引:1,他引:6
“十五”我国农机化技术发展面临农业结构调整、西部大开发、加入WTO的新形势,应坚持农机化技术创新、拓宽农机化技术领域、不同类型地区各有侧重重点突破的原则,重点研究开发农机化发展中的瓶颈技术、节本增效技术、促进农业可持续发展的技术和推广“十大”农机化技术,给农业增效、农民增收,实现农业现代化和农业可持续发展提供强有力的装备技术支撑 相似文献
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为了解年份、地域及基因型对山西小麦蛋白质品质的影响,分析了2005-2010年山西省参加南部和中部区试的冬小麦新品种(系)蛋白质品质指标的变化。结果表明,年际间、区试组间冬小麦品种(系)的蛋白质品质变异系数均表现为:沉淀值〉蛋白质含量〉湿/干面筋含量。旱地种植的小麦品种(系)各蛋白质品质参数平均值均高于水地种植的小麦。基因型、年份和种植地点对小麦蛋白质品质的作用力分析结果表明,三因素交互作用对小麦蛋白质品质影响最大,地点和基因型对小麦蛋白质品质的直接作用较小,年份对湿/干面筋含量影响较大,基因型、年份和种植地点两两交互效应大于单因素效应。 相似文献
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Genetic yield improvements in oat (Avena sativa L.) cultivars grown at high latitudes have resulted from marked changes in harvest index and yield components. This study was designed to investigate whether such changes have entailed alterations in duration of different developmental phases: vegetative, generative and grain filling phases and pre-anthesis generative sub-phases such as pre-fertile, pre-abortion, fertile pre-abortion, fertile and abortion sub-phases. We tested 14 oat cultivars released between 1921 and 1988 and 6 breeding lines. Ten randomly sampled plants of each oat entry were collected every 3–4 d (18 times) from seedling emergence until pollination, and apical developmental stages were determined on the most advanced spikelet. Cumulated degree-days (Cdd) for each critical developmental stage and component phases were determined (5 °C as a base temperature). At each measurement the number of leaves, green leaves and tillers on main shoot, apex length (mm) and height to the uppermost node, and stipule (cm) were recorded. Phyllochron (°C d leaf−1) and relative elongation rates (RER) for height characterising traits were calculated. Grain filling was the only period altered by breeding, while no consistent effects on duration of vegetative and generative pre-anthesis phases and sub-phases were detected. Different developmental phases were interrelated: in some cases cultivars with similar duration of pre-anthesis phase, however, differed in duration of some pre-anthesis sub-phases. Their duration was not, however, consistently associated with measured growth and yield parameters. Likely long days that make the northern growing conditions exceptional and unique, substantially narrowed the differences among oat entries in duration of different developmental phases, thereby making their role also less critical in yield determination contrary to the situation in the main global temperate cereal production regions. 相似文献
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回顾总结了武汉市蔬菜技术推广工作在"十二五"期间取得的成效,分析了当前武汉蔬菜生产及技术推广工作面临的新形势,展望了"十三五"期间武汉蔬菜技术推广工作的思路及工作重点。 相似文献
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选用本区单季晚粳稻品种“早单八”,对其原种不同代别的种子进行了纯度与产量以及相关性状的比较研究。结果看出:随原种种植代别的增加,田间纯度逐代下降,两者呈高度负相关(r=-0.868~(**)),而各代别的纯度与产量则存在极显著正相关(r=0.954~(**))。低代别种子之所以具有较高的生产力,拟主要通过提高结实率表实现的。进一步分析还看出:原种不同代别的杂株本与产量存在极显著的回归关系,其回归方程为Y=564.32—9.38X。综上表明:以田间杂株率高低来估计不同代别纯度种子的实际产量,将有一定的实践意义。按该方程推算,原种代别利用的临界纯度拟应为98%,原种连续种植的实际年效应最多为4年。 相似文献