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采用Ｅｂｅｒｈａｒｔ模式和方法分析了１９８８－１９８９年山西省中部地区旱地组区试中６个小麦，品种的丰产性和稳产性。结果表明，地点效应是影响小麦丰产性和稳产性的主要因素。各参试品种的丰产性存在相当大的差异，高产品种也是适应性强的稳产品种。丰产性和稳产性没有相关性。晋麦３４号（８４－１６ｒ）是个丰产性好、适应广的稳产品种，可以在较大的范围内推广种植。 相似文献
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根据2006~2008年全国糜子(糯性)区域试验产量汇总资料,采用标准差、变异系数、高稳系数和回归系数等多种分析方法对黍子新品种晋黍8号的丰产性、稳产性和适应性进行了分析和评价。结果表明:晋黍8号3年平均产量3167.3kg/hm2,较对照冀承黍1号增产11.04%,具有较高的丰产性。其稳产性、适应性也明显优于对照,是适宜大面积推广的新品种。 相似文献
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以内蒙古自治区水稻品种中熟组区域试验和生产试验原始数据为基础,对兴粳8号（乌兰4）的丰产性、稳产性、适应性、产量及相关农艺性状进行分析,探究了该品种的产量特性及合理的增产途径。结果表明,兴粳8号在各年度产量水平均显著高于对照绥粳18,表现出良好的丰产性;各年度的产量高稳系数均高于对照绥粳18且变异系数较低（<20%）,表现出良好稳产性;各年度参试的试验点具有良好的适应性,回归系数bi<1,在不同环境下适应性强。综上所述,兴粳8号在内蒙古自治区水稻品种区域试验和生产试验当中,产量表现突出,具有良好的丰产性、稳产性、适应性,品种推广意义和前景较大,研究内容可为兴粳8号的大面积推广应用工作提供及时有效的科学依据。 相似文献
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为了解周麦36号的生产特性，利用2016-2017年度国家黄淮南片小麦区试的试验结果，运用LSD法、高稳系数、GGE模型分析等对周麦36号的丰产性、稳产性及适应性进行分析。结果表明，周麦36号平均产量为8844 kg/ hm2，比周麦18（CK）增产5.73%，位列第3位，高温系数（HSC）为12.8%，小于对照；变异系数（CV）值较小、HSC值较小，说明周麦36号有较好的稳产性和适应性；通过GGE双标图可以看出周麦36号很好的丰产性，稳定性也特别的号。周麦36号在黄淮南片22个试点中表现较好的丰产性、稳定性及适应性，适合在黄淮南片推广应用。 相似文献
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采用适定性参数法对2008年度伊犁河谷春小麦品种的产量进行丰产性、稳定性分析。结果表明:品种4、品种1、品种3丰产性、稳产性最好,适应性最广;品种7、品种6丰产性、稳产性较差。 相似文献
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Soybean [Glycine max (L.) Merr.] plant density for maximum yield in Japan is usually from 16 to 25 plants m−2 . The objective of this study was to compare yield and yield components, especially node number between square- and zigzag- (an equilateral triangle-planting pattern or plants in the row offset from each other) planting patterns within a range of plant populations (16, 20 and 25 plants m−2 ).
Field experiments with cultivar Enrei (Maturity Group VII) were conducted in the field at Niigata University on a loamy sand soil in 1991, 1992 and 1993.
Yield increased as density decreased in 1991 and as density increased in 1992 and 1993. This result seemed to be due to adverse weather conditions during seed filling in 1991. Yield tended to be higher in zigzag- than in square-planting patterns except at 20 plants m−2 . Seed number m−2 due to increased yield was highly correlated with branch node number. The yield increase was caused by an increase in total node number, especially branch node number m−2 (about 60 % contribution at 16 plants m−2 and about 40 % contribution at 25 plants m−2 ). 相似文献
Field experiments with cultivar Enrei (Maturity Group VII) were conducted in the field at Niigata University on a loamy sand soil in 1991, 1992 and 1993.
Yield increased as density decreased in 1991 and as density increased in 1992 and 1993. This result seemed to be due to adverse weather conditions during seed filling in 1991. Yield tended to be higher in zigzag- than in square-planting patterns except at 20 plants m
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宁春50号是宁夏农林科学院农作物研究所育成的高产优质广适小麦新品种,用品种鉴定、品比试验、区试试验、生产试验以及大面积生产示范、农田生产等多年多点试验示范对该品种进行了产量形成及稳定性分析,以期为当前高产小麦育种栽培提供借鉴.结果表明,宁春50号较对照宁春4号表现出了较高的产量;宁春50号稳定性与宁春4号相当,在2007年区试中宁春50号丰产稳产性都高于宁春4号,在稳定性产量上还有提高的潜力;在不同区域条件下,宁春50号和宁春4号产量及产量构成变化幅度基本一致,变化幅度最大的为穗粒数,千粒重次之,穗数最低;宁春50号产量及产量构成平均值较宁春4号都高,表明宁春50号具有较好的遗传特性,增产潜力明显;产量达到8 000 kg/hm2以上,平均穗数达到669.8×10 4穗/hm2,平均穗粒数为30.9粒/穗,千粒重为42.8 g,在5 000 kg/hm2到1 000 kg/hm2产量水平变化过程中,穗数、千粒重都呈现明显的递增趋势,而穗粒数变化趋势不明显;宁春50号产量增加与穗数、千粒重关系密切,相关系数分别为0.37、0.34,达到了极显著水平,与稳粒数关系未达到显著水平.宁春50号增产要提高穗数和千粒重,并采取相应的栽培管理措施. 相似文献
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A. Ghizaw T. Mamo Z. Yilma A. Molla Y. Ashagre 《Journal of Agronomy and Crop Science》1999,182(3):167-174
The faba bean is among the major grain legumes cultivated in Ethiopia and is used extensively as a break crop in the highlands. Although a blanket application of DAP (diammonium phosphate) at the rate of 100 kg · ha?1 has been practised in faba bean production in the country, this was not based on research results. In addition, little information is available on the response of the crop to N and P fertilizers under diverse environmental conditions. Hence, field experiments were carried out at three locations in 1991, seven locations during 1992 and 1993 and at one location in both 1993 and 1995 to determine faba bean response to N and P fertilization. Five levels of N (0, 9, 18, 27 and 36 kg N · ha?1 as urea) in factorial combinations with four levels of P (0, 23, 46 and 69 kg P2O5 · ha?1 as TSP [triple super phosphate]) were studied in a randomized complete block design with four replications in the first year. In the remaining years four levels of N (0, 18, 27 and 36 kg N · ha?1 as urea) in factorial combinations with four levels of P (0, 23, 46 and 92 kg P2O5 · ha?1 as TSP) were used in a randomized complete block design with three and four replications at one and seven locations, respectively. Results indicated that a positive linear response of faba bean seed yield was noted at all locations (except Debre Zeit and Burkitu) to P fertilization, while a significant quadratic response was also found at Holetta. In addition, plant height, above ground biomass and number of pods per plant were positively influenced by P application while the effect of N on these was mostly nonsignificant. Faba bean seed yield response to N was noted at only two out of eight locations; in most cases, nonsignificant and inconsistent seed yield responses to N fertilization were obtained. There was nonsignificant N × P rate interaction. In conclusion, we do not recommend supplemental N application to faba bean at six out of eight locations but we recommend the application of P fertilizer to faba bean at almost all locations (with the exception of Debre Zeit) and for other soils deficient in available P. Further work is recommended on the determination of critical levels for soil-available P, below which P fertilization should be practised for optimum faba bean seed yield. 相似文献
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玉米秣食豆混播比例对群体产量及产量构成的影响 总被引：1，自引：0，他引：1
为了提高玉米单产和土地利用率,通过将玉米‘郑单958’和秣食豆按1:1、1:2、1:3的比例进行混播,以单作玉米作为对照,研究了混播群体的地上产量及构成。结果表明,玉米产量占群体产量的87.4%以上;随混播秣食豆的比例增加,玉米产量略有下降,其中茎叶产量下降明显,而秣食豆产量增加;混播群体地上生物产量和经济产量均随混播秣食豆比例增加而增加,并且各混播处理均显著高于玉米单作,其中1:3(A1B3)和1:2(A1B2)的群体地上产量分别比单作玉米提高15.5%和16.4%。 相似文献
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干旱胁迫时期对水稻产量及产量性状的影响 总被引：2，自引：0，他引：2
为了明确干旱胁迫对水稻产量及产量性状的影响,以粳稻品种农大3号为材料,利用盆栽的方式人工控制土壤水分（水势）,研究了不同生育阶段干旱胁迫对产量及产量性状的影响。结果表明：任何时期干旱胁迫都会导致减产,孕穗中期、后期减产幅度最大,其次是分蘖中期、前期。分蘖后期（无效分蘖期）干旱虽然穗粒数有所增加,但是祢补不了由于穗数下降造成的产量损失,出穗前各阶段干旱胁迫的减产幅度大于出穗后各阶段。分蘖期干旱使单穴有效穗数减少,孕穗期干旱穗粒数减少;孕穗期、产量形成期（出穗—乳熟期）干旱千粒重、成熟粒率降低;孕穗中期干旱结实率下降,混合千粒重降低。干旱胁迫条件下,提高单穗平均粒数和混合千粒重有助于提高产量,提高饱满千粒重和混合千粒重有助于提高成熟粒率。 相似文献
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Useful light interception during reproductive stages is very important for soybean ( Glycine max (L.) Merr.) dry matter production. The objective of this experiment was to investigate the light utilization in the canopy for yield, and its components in the case of arranging branch direction to row direction with flat type (1/2 phyllotaxy) soybean. The field study was conducted in the field at Niigata University on a loamy sand soil at 25, 16 and 9 plants m−2 in 1994, 1995 and 1996, using cultivar 'Miyagishirome' (Maturity Group VII or VIII, phyllotaxy 1/2; branches develop flatly) with treatments so that branches developed at right angles direction (Type R) and in a parallel direction (Type P) to the direction of the row.
Total dry weight (TDW) was greater in Type R than in Type P. A higher leaf area index (LAI) was shown in Type R than in Type P in each plant density among the three years. More light penetrated into the canopy in Type R than in Type P. Higher TDW and LAI were produced by effective light interception at the canopy of Type R.
Yield and its components were greater in higher than lower density and tended to be greater in Type R than in Type P. Increased yield depend on seed, pod and node number m−2 . The increase of yield components in Type R was suggested to be due to favorable light condition in the canopy, compared with Type P. 相似文献
Total dry weight (TDW) was greater in Type R than in Type P. A higher leaf area index (LAI) was shown in Type R than in Type P in each plant density among the three years. More light penetrated into the canopy in Type R than in Type P. Higher TDW and LAI were produced by effective light interception at the canopy of Type R.
Yield and its components were greater in higher than lower density and tended to be greater in Type R than in Type P. Increased yield depend on seed, pod and node number m
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M. Hühn 《Journal of Agronomy and Crop Science》1991,166(5):308-317
The harvest index Z is defined, for example for cereals, as the ratio between grain yield X and biological yield Y: Z = X/Y. In this paper the character associations among biological yield, grain yield and harvest index have been investigated theoretically by calculating the covariances and correlation coefficients between harvest index and grain yield and, additionally, between harvest index and biological yield. Explicit formulae are derived for these covariances and correlation coefficients and conclusions are derived and discussed. Many facts and relations among these characters which are well-known and frequently established by many experimental studies with quite different crops can be obtained and characterized by these theoretical investigations as necessary implications of the underlying statistical relationships.
Finally, all the theoretical studies and results are demonstrated and applied to a numerical example of winter-rapeseed data. 相似文献
Finally, all the theoretical studies and results are demonstrated and applied to a numerical example of winter-rapeseed data. 相似文献