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玉米杂交种丹玉26选育技术报告 总被引:6,自引:6,他引:6
丹玉26(丹2100)是丹东农业科学院以自选系丹9046为母本,丹598为父本组配而成的玉米杂交种.该品种属晚熟品种,需≥10℃积温3 100℃·d左右.1995~1999年在各级各类区域试验中表现高产、稳产、抗病、抗倒、耐旱、适应性强.一般单产9 750 kg/hm2以上,比各地主栽品种增产8%以上.适宜在吉林南部、辽宁大部及华北春玉米区种植.种植密度以每公顷43 500株为宜,比空和清种均可 相似文献
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早熟春玉米新品种龙单13的选育及利用 总被引:13,自引:6,他引:7
早熟春玉米新品种龙单13由黑龙江省农科院玉米研究中心抗病育种室选用半马齿型改良自交系K10为母本,以自育二环系龙抗11为父本杂交育成,1994年春经黑龙江省农作物品种审定委员会审定推广。该品种生育日数112~115d(哈尔滨),需≥10℃积温2320℃*d,具有产量水平高、抗病抗逆性强,子粒商品品质好,适应性广的特点。适宜黑龙江省第三积温带和第二积温带下限以及吉林山区、半山区、内蒙古东北部旗(县)、河北部分市(县)等早熟春玉米区种植。到1999年龙单13累积推广面积已达173.82万hm2,已成为北方早熟春玉米区主栽品种之一。 相似文献
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1994年辽宁东亚种子科学研究院玉米育种所组配出LD175×LD53杂交种,2000年4月通过河北省农作物品种审定委员会的审定,命名为东单8号.该品种春播生育期132d(沈阳),需≥10℃积温2900℃·d,幼苗拱土能力强,长势健壮.一般单产9000~12000kg/hm2,较掖单13增产7.3%~14.6%,较沈单7号增产14.1%~26.8%;中抗(MR)小斑病,抗(R)丝黑穗病,高抗(HR)茎腐病,根系发达,抗倒伏,活秆成熟.子粒含粗蛋白9.70%,粗脂肪5.53%,粗淀粉70.48%,赖氨酸0.30%,超过国标普通玉米优质指标。 相似文献
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赤早5号是内蒙古赤峰市农科所以外引系K10为母本,自育系87黄12为父本育成的玉米单交种。2004年4月通
过内蒙古自治区品种审定委员会审定(蒙审玉2004016),2006年被内蒙古自治区列为良种补贴品种。该品种属早熟品种,需≥10℃活动积温2 300~2 500℃·d。1997~2000年在各级产量试验中表现早熟、高产、稳产、多抗。适宜在内蒙古赤峰、兴安盟、呼盟,河北、黑龙江省部分地区种植,到2006年已推广面积达3万多hm2。制种时,父母本行比1∶5或1∶6种植,父母本同期播种 相似文献
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河南省玉米生产现状、问题与对策 总被引:4,自引:1,他引:3
对2000~2007年河南省玉米生产现状进行分析,玉米单产、总产和种植面积都呈逐年上升态势。推广面积在0.667万hm2以上品种保持在20~30个,6.67万hm2以上品种3~7个。自育品种所占比例逐年升高,推广面积占全省比例越来越大,2007年达77.6%,平均每年增幅14.68万2。耐密型品种呈持续上升趋势,稀植大穗型品种则呈不断下降的趋势。种质集中在改良Reid、塘四平头和PB系统,占87%。对河南省玉米单产、总产和增产潜力做了分析,并提出了玉米生产中存在的问题与对策。 相似文献
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通过1995~2001年对"双千五田"立体栽培中玉米种植密度的调查,一套两作型的紧凑叶型品种60000~80000株/hm2的比40000~60000株/hm2的增产5.3%,四套五作型的紧凑叶型品种95000~115000株/hm2的比65000~90000株/hm2的增产24.1%.7年的调查研究表明,"双千五田"立体栽培中紧凑叶型品种比平展叶型品种增产14.8%.按纯面积计算,紧凑叶型品种合理的种植密度为,一套两作型的中秆品种75000株/hm2左右,高秆品种68000株/hm2左右;四套五作型的中秆品种111000株/hm2左右,高秆品种100000株/hm2左右。 相似文献
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W. L. Porter 《American Journal of Potato Research》1967,44(10):382-382
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Effects of timing and rate of N fertilizer application on concentrations of P, K, S, Ca, Mg, Na, Cl, Mn, Fe, Cu and Zn in herbage from perennial ryegrass/white clover pastures were studied at two sites in south-western Victoria, Australia. Nitrogen fertilizer (0, 15, 25, 30, 45 and 60 kg ha–1 ) was applied as urea in mid-April, early May, mid-May, early June and mid-June 1996 to pastures grazed by dairy cows. At Site 1, N fertilizer resulted in a linear increase in P, K, S, Mg and Cl concentrations in herbage and a linear decrease in Ca concentration. For all times of application, concentrations of P, K, Ca, Mg and Cl in herbage increased by 0·0048, 0·08, −0·010, 0·0013 and 0·053 g kg–1 dry matter (DM) per kg N applied respectively. For S concentration, maximum responses occurred in mid-May (0·012 g kg–1 DM per kg N applied). At Site 2, N fertilizer resulted in a linear increase in P, S and Na concentrations in herbage, a linear decrease in Ca concentration and a curvilinear increase in K and Cl concentration. The maximum responses for P, S and K concentrations in herbage occurred for the N application in mid-June and were 0·015, 0·008 and 0·47 g kg–1 DM per kg N applied respectively. For Cl concentration, the maximum response occurred for the N application in early June and was 0·225 g kg–1 DM per kg N applied. Overall, applications of N fertilizer up to 60 kg ha–1 did not alter herbage mineral concentration to levels that might affect pasture growth or animal health. 相似文献
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Krishna Kumari S Thayumanavan B 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,53(1):47-56
Scanning electron microscope (SEM) pictures of small millet starch granules showed more large polygonal and few small spherical or polygonal granules. The granules of small millets resembled those of rice starch granules. The size of the starch granules ranged from 0.8–10 m. The size of the granules was larger in barnyard millet and smaller in proso millet. Several granules showed deep indentation caused by protein bodies. SEM of starch isolated from 24 hour-germinated kodo millet showed pitting or pinholes at some points due to the attack of amylases (preferentially on bigger granules). Brabender viscoamylograph studies on small millet starches revealed that the gelatinization temperatures ranged from 75.8 to 84.9 ° C. Barnyard millet possessed lower amylograph viscosity, minimum breakdown, and relative breakdown values when compared to the other small millets. 相似文献