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不同适应生态区域粳稻新品种丰产性稳产性试验研究 总被引：1，自引：0，他引：1
依据参试品种在各试验点与各年份试验结果,经过数理统计及相关因素科学分析,依次进行比较,从而鉴定各品种在不同年份,不同适应区域试验的丰产性稳产性,并以同一试验点所有参试品种产量的平均值为生态环境指数称自变量,以各参试品种产量均值为依变量进行回归分析,以确定每个参试品种的稳定性,为粳稻新品种在其适应种植区域应用、推广提供科学数据,对今后粳稻遗传育种研究,选育新品种具有指导意义。 相似文献
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为了评价小麦新品种(系)在不同生态条件下的丰产稳产性,应用高稳系数(HSC)法与常规分析方法相结合对2001～2002年甘肃省水地春小麦区域试验东、西片试区19个参试品种(系)的丰产性与稳产性进行了分析。结果表明,东片参试品系98SN146、93元-7、CM4860以及西片参试品系91D58-4、石1269、酒86141的标准差、变异系数和HSC值较小,HSC值分别为26.78%、27.69%、27.73%、18.07%、18.14%和22.42%,说明这些品系的丰产稳产性较好。研究表明,用高稳系数法评价小麦新品种(系)的丰产稳产性是可行的,将两种方法结合应用能更准确地反映小麦新品种(系)的丰产稳产性。 相似文献
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用高稳系数法分析了1994～1996年福建省红麻新品种区域试验中6个参试品种的高产稳产性,并与一般统计分析中的几种稳定性参数进行比较与相关分析.结果表明,用高稳系数法分析红麻新品种高产稳产性更准确、更简便. 相似文献
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用高稳系数法分析了 1 994～ 1 996年福建省红麻新品种区域试验中 6个参试品种的高产稳产性 ,并与一般统计分析中的几种稳定性参数进行比较与相关分析。结果表明 ,用高稳系数法分析红麻新品种高产稳产性更准确、更简便。 相似文献
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应用高稳系数法分析红麻新品种高产稳产性 总被引：1，自引：0，他引：1
用高稳系数法分析了１９９４～１９９６年福建省红麻新品种区域试验中６个参试品种的高产稳产性,并与一般统计分析中的几咱稳定性参数进行比较与相关分析。结果表明,用高稳系数法分析红麻新品种高产稳产性更准确、更简便。 相似文献
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用高稳系数法分析了参加 1990～ 1991青藏高原青稞新品种联合区试的 11个参试品种的高产稳产性 ,并将所得结果与常用的统计分析方法计算的稳定性参数进行了比较和相关分析。结果表明只有高稳系数 (HSC)能综合地表示品种 (系 )的高产稳产性 ,是分析青稞新品种 (系 )高产稳产性的简捷方法 ,可在育种上应用。 相似文献
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用高稳系数法分析了参加1990－1991青藏高原青稞新品种联合区试的11个参试品种的高产稳产性，并将所得结果与常用的统计分析方法计算的稳定性参数进行了比较和相关分析。结果表明只有高稳系数（HSC）能综合地表示品种（系）的高产稳产性，是分析青稞新品种（系）高产稳产性的简捷方法，可在育种上应用。 相似文献
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应用高稳系数法分析了１９９６～１９９７年江苏省早熟抗病棉花品种区域各参试品种的高产稳产性,并与常用的统计分析方法计算的几种稳定性参数进行了比较和分析。结果表明,高稳系数法是分析棉花新品种（系）高产稳产性的准确、简便的方法。 相似文献
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《Journal of Crop Improvement》2013,27(1):301-308
Summary The current situation of crop production in China is reviewed, along with strategies to meet future food needs of its population. 相似文献
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杂种稻的光合适应性及光合生产力研究 总被引：12，自引：1，他引：12
用不同光强生态型水稻品种Lemont和七桂早，利用化学杂交剂配制得杂种稻Le／七。对Le／七及其亲本在人工气候箱中高、低光强条件下处理30 d，每10 d作一次光合测定及生长分析。量子产量和单叶净光合速率的测定结果表明：Le／七对高、低光强的适应范围比双亲有所扩大，尤其是在高光强下量子产量相对降低值Le／七比七桂早明显为低。处理期间杂种Le／七比七桂早明显为低。处理期间杂种Le／七的光合生产力(以作物生长率CGR表示)和生物学产量增加值在高、低光强条件下均明显超过了其父本广东当地优良品种七桂早，其CGR和生物学产量高的主要原因是其叶面积指数(LAI)、净同化率(NAR)由于杂种优势比七桂早明显为高。 相似文献
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Two red clover ( Trifolium pratense ) cultivars, Red Head (tetraploid) and Kuhn (diploid), were sown at a seed rate of 13 kg ha−1 either alone or in mixture with Italian ryegrass ( Lolium multiflorum ) cv. RvP sown at seed rates of 10, 15, 20 or 30 kg ha−1 . RvP was also sown alone at a seed rate of 30 kg ha−1 and received nil or 300 kg ha−1 fertilizer a−1 fertilizer N. All plots were established using the barley cultivar Midas sown at a seed rate of 100 kg ha−1 as a nurse crop.
Neither clover cultivar nor ryegrass seed rate significantly influenced either dry matter harvested or botanical composition over the 3 harvest years. On average over all years the grass-clover mixtures produced 75% of the yield of the N-fertilized RvP, 125% of the clover monocultures and 225% of the unfertilized RvP. The red clover contribution to the total dry matter harvested of the mixtures averaged 45–60%. The dry matter concentrations of the mixtures were considerably higher than those of the pure clover stands. In the third year yields were markedly reduced in comparison with those in the first and second years.
It was concluded that Italian ryegrass can be a suitable companion grass for red clover. Its superior yielding capacity over other grasses such as perennial ryegrass or timothy under a conservation management can be coupled to advantage with red clover to give a sward which Is essentially stable, at least over a 2- to 3-year cropping period, although giving slightly reduced yields in the third year. Italian ryegrass-red clover mixtures, without the use of fertilizer N, can produce high DM yields of good quality herbage. 相似文献
Neither clover cultivar nor ryegrass seed rate significantly influenced either dry matter harvested or botanical composition over the 3 harvest years. On average over all years the grass-clover mixtures produced 75% of the yield of the N-fertilized RvP, 125% of the clover monocultures and 225% of the unfertilized RvP. The red clover contribution to the total dry matter harvested of the mixtures averaged 45–60%. The dry matter concentrations of the mixtures were considerably higher than those of the pure clover stands. In the third year yields were markedly reduced in comparison with those in the first and second years.
It was concluded that Italian ryegrass can be a suitable companion grass for red clover. Its superior yielding capacity over other grasses such as perennial ryegrass or timothy under a conservation management can be coupled to advantage with red clover to give a sward which Is essentially stable, at least over a 2- to 3-year cropping period, although giving slightly reduced yields in the third year. Italian ryegrass-red clover mixtures, without the use of fertilizer N, can produce high DM yields of good quality herbage. 相似文献
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主要介绍天然橡胶种植业生产效率的国内外研究进展，并分析现有研究的侧重点及不足，探索天然橡胶生产效率研究的合理思路。 相似文献
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3个玉米杂交种的丰产稳产性分析 总被引：2，自引：0，他引：2
采用Eberhart-Russell模型和高稳系数法,对3个玉米杂交种的丰产稳产性进行了综合评定。结果表明,杂交种正红2号、正红6号和正红115区试平均产量分别为7 575.0 kg/hm2、7 611.8 kg/hm2和7 304.0 kg/hm2,分别比对照增产10.2%、16.6%和6.2%,丰产性突出,稳产性较好,生态适应性强。3个杂交种在环境指数4 500～9 000 kg/hm2时比对照均有不同程度的增产。在生产水平6 000 kg/hm2以上的地区更能充分发挥正红2号的增产增收潜力。 相似文献
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《Journal of Crop Improvement》2013,27(1-2):7-29
SUMMARY The strategic linkages between agriculture and nutrition to combat malnutrition have been described as “Food systems,” “Field fortification,” and “Food based” strategies. These new strategies have evolved due to the realization of the limitations of supplementation and food fortification programs in developing countries. The measures, extent and causes of malnutrition and the components of the “Food systems” strategies to combat malnutrition in humans, will be dependent on the target population group of a region. The framework for this linkage encompasses several components, and “Food systems” strategies employed will be specific to a region. Traditionally, linkages between the management and production of crops, especially staple crops, and human nutrition were not strong, and research in these two areas was mutually exclusive. This article discusses the concepts behind the linkages between agriculture and human nutrition and the strategies to combat human malnutrition. 相似文献
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《Journal of Crop Improvement》2013,27(1):285-302
Summary Mycorrhizae refer to an association (largely symbiotic) between plants and fungi that colonize the cortical root tissue of most agricultural crops during the period of active plant growth. The contribution of these symbioses to plant growth and soil fertility maintenance has been well-recognized for past several years. In spite of these benefits to agriculture, at present, the realization of the full potential of these fungi has not yet been reached. It must also be recognized that recent research on the possible application of the mycorrhizal symbiosis in agriculture has revealed many gaps in knowledge of fungal biology and ecology. Scientific knowledge on the role of these fungi in plant development and protection, soil stabilization, aggregate formation and creation of nutrient reserves is still limited. For efficient use and manipulation of these fungal symbioses for long-term agricultural stability and productivity, our understanding of their physiology, function and interactions with existing crops and environmental conditions should be improved. Besides, effects of different agronomic practices, application of chemical fertilizers and pesticides on their ecology and function should be elucidated before their successful utilization in agriculture. This paper presents information on the morphology of different my-corrhizal fungi, their physiology and functions. Methods presently used to produce mycorrhizal inocula, their application in the field, problems to be resolved for their massive exploitation and future research needs have also been described. References have been selected to explain the recent advances in our understanding on these beneficial fungi. 相似文献