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1.
玉米杂交种正红2号群体结构与密肥优化方案的研究 总被引：1，自引：2，他引：1
采用两因素五水平裂区试验设计方法,研究了种植密度和施氮量对玉米新杂交种正红2号的产量及其群体结构的影响,建立了优化栽培模型。结果表明,正红2号产量在7500kg/hm2以上的高产栽培技术方案为:种植密度为58542.2～75474.3株/hm2,施氮量为188.50～336.50kg/hm2。 相似文献
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分析2011～2012年合浦县甘蔗新台糖22号3个“3414”肥料效应试验,结果表明,施肥处理均能显著提高甘蔗的产量和经济效益,产量比不施肥处理1(CK)增长17.0%～64.1%;经济效益增收0.30万～1.43万元/hm2。建立3个试验的肥料效应函数模型,综合得出甘蔗新台糖22号最高产量10.70 t/hm2、最高施肥量氮(N)530.0 kg/hm2、磷(P2O5)116.0 kg/hm2、钾(K2O)340.7 kg/hm2和最佳经济产量10.6 t/hm2、最佳施肥量氮(N)438.6 kg/hm2、磷(P2O5)110.9 kg/hm2、钾(K2O)272.9 kg/hm2。结合当地实际情况,总结出合浦县中低等肥力田块种植甘蔗新台糖22号的科学施肥配方为氮(N)450 kg/hm2、磷(P2O5)120 kg/hm2、钾(K2O)280 kg/hm2,施肥比例为N∶P2O5∶K2O＝1∶0.27∶0.62,产量10.59～10.70 t/hm2。 相似文献
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1 凉山州马铃薯生产状况 四川省是全国马铃薯栽培面积最大的省份之一,常年种植面积在27万hm2,其中凉山州常年种植面积在6.4万hm2,属于西南一、二季作垂直分布区.凉山州位于四川省西南部横断山区东北部,青藏高原东南部,界于四川盆地与云南省中部高原之间,地理位置在北纬26°03′～29°18′,东经100°03′～103°52′之间,属立体气候类型.马铃薯是凉山州山区特别是高寒山区主要的粮食作物之一,其播种面积仅次于玉米、水稻,居第3位.1952年马铃薯种植面积3.9 hm2,总产55385 t,单产94.5 kg/667m2,1980年种植面积5.5 hm2,总产为129160 t,单产155.5 kg/667m2,1981年种植面积6.3 hm2,总产154470 t,单产164.5 kg/667m2,1984年播种面积5.97 hm2,总产179835 t,单产201 kg/667m2,2000年播种面积6.1 hm2,总产250625 t,单产275 kg/667m2,2001年播种面积6.05 hm2,总产249355 t,单产为265 kg/667m2. 相似文献
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采用二次回归旋转组合设计在黑龙江绥化对垦稻12进行了不同种植密度、不同施肥量对产量影响的比较研究。结果表明,垦稻12在种植密度为27.7万丛/hm2,氮、磷、钾施肥量为92.36 kg/hm2、37.5 kg/hm2、75.8 kg/hm2时产量最高,达9 266.8 kg/hm2;在种植密度30.5万丛/hm2,氮、磷、钾施肥量为70.0 kg/hm2、50.3 kg/hm2、90.9 kg/hm2时的食味品质分最高,为84.8分。 相似文献
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采用五元二次正交旋转组合试验设计,研究种植密度、施氮量、施磷量、施钾量和施钙量等5个栽培因素对春花生新品种莆花3号产量的影响.结果表明,五因子对花生产量影响的大小顺序依次为:种植密度＞CaO＞纯N＞K2O＞P2O5;莆花3号实现产量＞4500kg/hm2的最优农艺措施组合方案为:种植密度2.6271×105～2.7369×105株/hm2,施氮量149.46～153.21kg/hm2,施磷量87.48～91.05kg/hm2,施钾量177.66～181.32kg/hm2,施钙量56.04～57.87kg/hm2. 相似文献
6.
齐齐哈尔市是马铃薯的盛产区 ,全市种植面积 13.3万hm2 ,最高年份可达 2 0万hm2 ,平均产量 195 0 0～2 2 5 0 0kg/hm2 ,经过马铃薯大垄高产栽培技术研究示范后两年 ,产量平均为 2 6 2 5 0kg/hm2 ,可多产马铃薯 375 0kg/hm2 。全市两年共计推广马铃薯大垄高产栽培技术6 .5万hm2 ,新增总产 2 4 375万kg(按 0 .6元 /kg计算 ) ,可新增收 14 6 2 .5万元 ,经济效益十分可观。其主要栽培技术有以下几方面。1 选择优质高产良种在品种选择上 ,首先根据市场需求 ,合理安排。外销薯以鲁引 1号 ,早大白 ,尤金 ,东农 30 3,克新 4号为主 ;食用薯品种为苏… 相似文献
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苦荞麦新品种定引1号引育报告 总被引：1，自引：0，他引：1
定引1号是从西北农林科技大学引进,经6年试验成功的具有抗病、抗旱、早熟、丰产、适应性广的优质(高芦丁含量)加工型苦荞麦新品种.籽粒水分含量11.48%,粗蛋白含量128.7g/kg,粗脂肪含量26.6 g/kg,粗淀粉含量659.3 g/kg,芦丁含量高达26.1 g/kg;2000～2002年3年全国区域试验定西试点平均产量2 213.55 kg/hm2,较对照九江苦荞增产6.27%;2002～2004年3年示范21点次,平均产量1 472.1 kg/bm2,较对照凉荞1号增产242.25 kg/hm2,各点增幅为3.1%～29.2%;2003～2004年在全市各地生产试验平均产量2 070～2 520kg/hm2,增产幅度为3.6%～17.8%.适宜在甘肃中部半干旱地区及同类地区种植. 相似文献
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研究了不同种植密度和施氮量对粮饲兼用玉米品种雅玉8号产量的影响。结果表明,雅玉8号的最佳种植密度为9.75万株/hm2,最佳施氮量为337.5kg/hm2,鲜物质产量达71032.10kg/hm2,干物质产量达22820.10kg/hm2,果穗干物质产量达11547.64kg/hm2。通过对种植密度和施氮量与生物产量之间的关系建立的回归模型预测可知,当种植密度为10.68万株/hm2、施氮量为273.48kg/hm2时能获得最高的鲜物质理论产量70798.72kg/hm2;当种植密度为11.13万株/hm2、施氮量为280.52kg/hm2时能获得最高的干物质理论产量22936.30kg/hm2。种植密度和施氮量对雅玉8号生物产量及果穗产量的影响均达极显著水平。 相似文献
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高科2号是杨凌农业高科技发展股份有限公司以自选系W44作母本,自选系W43作父本于1998年育成的中早熟玉米单交种。夏播生育期95～100d,田间性状表现为株型紧凑、穗上叶夹角小、长势健壮、抗逆及抗病性强、持绿期长、适应性广等特点。适宜陕西关中及同类生态区种植,种植密度为45000～52500株/hm2,一般单产在7500～9750kg/hm2,高产田产量可达10500kg/hm2以上,还可粮饲兼用。 相似文献
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Sorghum and millet phenols and antioxidants 总被引：5，自引：2，他引：5
Sorghum is a good source of phenolic compounds with a variety of genetically dependent types and levels including phenolic acids, flavonoids, and condensed tannins. Most sorghums do not contain condensed tannins, but all contain phenolic acids. Pigmented sorghums contain unique anthocyanins that could be potential food colorants. Some sorghums have a prominent pigmented testa that contains condensed tannins composed of flavan-3-ols with variable length. Flavan-3-ols of up to 8–10 units have been separated and quantitatively analyzed. These tannin sorghums are excellent antioxidants, which slow hydrolysis in foods, produce naturally dark-colored products and increase the dietary fiber levels of food products. Sorghums have high concentration of 3-deoxyanthocyanins (i.e. luteolinidin and apigenidin) that give stable pigments at high pH. Pigmented and tannin sorghum varieties have high antioxidant levels that are comparable to fruits and vegetables. Finger millet has tannins in some varieties that contain a red testa. There are limited data on the phenolic compounds in millets; only phenolic acids and flavones have been identified. 相似文献
13.
《Journal of Cereal Science》2007,45(3):236-251
Sorghum is a good source of phenolic compounds with a variety of genetically dependent types and levels including phenolic acids, flavonoids, and condensed tannins. Most sorghums do not contain condensed tannins, but all contain phenolic acids. Pigmented sorghums contain unique anthocyanins that could be potential food colorants. Some sorghums have a prominent pigmented testa that contains condensed tannins composed of flavan-3-ols with variable length. Flavan-3-ols of up to 8–10 units have been separated and quantitatively analyzed. These tannin sorghums are excellent antioxidants, which slow hydrolysis in foods, produce naturally dark-colored products and increase the dietary fiber levels of food products. Sorghums have high concentration of 3-deoxyanthocyanins (i.e. luteolinidin and apigenidin) that give stable pigments at high pH. Pigmented and tannin sorghum varieties have high antioxidant levels that are comparable to fruits and vegetables. Finger millet has tannins in some varieties that contain a red testa. There are limited data on the phenolic compounds in millets; only phenolic acids and flavones have been identified. 相似文献
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概述了海峡两岸农业交流与合作的现状,提出了应该共同呼吁尽快实现两岸“三通”,开放农业生物技术图书期刊资料交流以及开放生物学科方面网络的思路,以便为农业交流与合作的顺畅开展打好基础,并寄希望能够就糖蔗、果蔗以及甘蔗笋等方面的研究与开发到台湾学习取经,开展学术交流或与台湾同行共同开展研究,为我省甘蔗业的发展作出贡献。 相似文献
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近年来，随着大豆播种面积的增长，受病虫危害日趋严重。特别是大豆根潜蝇（又名根明）与根腐病共同发生危害，严重影响大豆的生产。综合防治技术主要手段是三年以上轮作，适时播种及种衣剂拌种等措施。 相似文献
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Summary Between 1993 and 1998 205 different potato cultivars and 1220 accessions/genotypes of wild and cultivated potato species from
the IPK Genebank Gatersleben were evaluated. Parameters interesting for starch isolation and especially for the use of starch
were determined. Altogether, there was a higher variability in wild potato species than in cultivated potatoes for all characteristics
investigated: dry matter content, starch content, protein content, amylose content and mean particle diameter of starch granules. 相似文献
18.
种子加工、检验理论与技术现状及思考 总被引：3，自引：0，他引：3
种子加工及检验是种子向市场流通的关键，是商业化育种中赋予种子商品属性不可或缺的环节。种子加工、检验理论与技术的研究是完善种业产业链、实现规模化商业育种、夯实“育繁推一体化”种业科学的重要一环。中国的种业科学技术体系正在形成与完善之中，受制于行业发展水平，种子加工及检验理论与技术相对薄弱。本文回顾了种子加工及检验理论与技术研究发展历程，提出了完善中国种业科学发展的策略与建议。围绕种业发展的需要，在做好品种优质化繁育的基础上，分析种子加工及检验理论与技术的新方向和新需求，加强种业应用性研究，建立先进的种子质量检验体系，研制适合现代种业发展需求的种子加工设备，打造种子加工产业标准化生产体系，完善种业科学技术学科建设，促进种业产业持续健康发展。 相似文献
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《Journal of Crop Improvement》2013,27(1):313-324
Summary Arbuscular mycorrhizae were inoculated into phosphorus-deficient soil fertilized with either organic or chemical fertilizer with cucumber (Cucumis sativus L.) as the first crop and lettuce (Lactu-ca sativa L.) as the second crop but without additional fertilization and AM inoculation. AM increased dry matter and fruit yield of cucumber significantly in the unfertilized, organic-fertilized and P-deficient plants compared with the fully chemical-fertilized plants. AM inoculation increased the available phosphorus in plant and soil by around 30% for all treatments except for those chemically-fertilized. The rate of AM infection did not differ significantly among the fertilization treatments, but the infection intensity was higher in unfertilized, organic-fertilized and phosphorus-deficient treatments than chemical-fertilized treatment. The residual effects of AM-inoculated to cucumber were evident for lettuce in all pre-treatments that were unfertilized and un-inoculated for the second cropping. Without P-fertilization, neither crop could grow optimally even when the soil was inoculated with AM, suggesting that AM could not serve as a substitute for phosphorus fertilizer. However, the other beneficial effects of AM on crop growth and yield could not be fulfilled with phosphorus fertilizer. 相似文献
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In field experiments conducted over 2 years in Mediterranean conditions, five winter and five spring triticales were evaluated for forage and grain production in the same cropping season. The experiments had two treatments, namely harvesting for grain only, and dual-purpose forage and grain production. In the latter treatment, forage was cut when the first node was detectable (Zadoks' stage 31), without removing the apical meristems. Grain was harvested when ripe (Zadoks' stage 92) in both cut and uncut plots.
Environmental conditions affected grain production and protein content more than forage yield and quality. Winter triticales yielded about 43% more forage than spring types, but after forage removal the spring types yielded about 36% more grain than winter triticales.
Reductions in grain yield after clipping were more pronounced in winter (32%) than in spring (19%) types. Forage crude protein content was significantly higher in the spring types studied (24.6%) than in the winter types (23.5%), the opposite being true for fibre content (20.7 and 21.6% respectively). Grain crude protein content did not differ between grain and dual-purpose treatments, but was higher in the spring triticales (12.8%) than in the winter types (11.9%). There was more variability for the measured traits within the winter triticales studied than within the spring types. 相似文献
Environmental conditions affected grain production and protein content more than forage yield and quality. Winter triticales yielded about 43% more forage than spring types, but after forage removal the spring types yielded about 36% more grain than winter triticales.
Reductions in grain yield after clipping were more pronounced in winter (32%) than in spring (19%) types. Forage crude protein content was significantly higher in the spring types studied (24.6%) than in the winter types (23.5%), the opposite being true for fibre content (20.7 and 21.6% respectively). Grain crude protein content did not differ between grain and dual-purpose treatments, but was higher in the spring triticales (12.8%) than in the winter types (11.9%). There was more variability for the measured traits within the winter triticales studied than within the spring types. 相似文献