不同密度杂种落叶松枯枝落叶营养元素的动态特征

对4种造林密度杂种落叶松枯枝落叶做了分解试验，对不同分解时期枯枝落叶中的N、P、K等元素进行了测定，结果显示：造林密度对枯枝落叶中氮、钾元素的初始含量有显著影响，而对其他元素影响不显著。枯枝落叶中的氮、钾、钙和镁元素在分解的第一年下降较快，而磷则是第二年的减少量高于第一年。造林密度为3300株/hm2和4400株/hm2的林分，在枯枝落叶的分解过程中，各养分浓度的减少量较大，密度过大或过小都不利于养分的归还。     

优质软米型籼稻不育系龙丰A的选育

龙丰A是以(珍汕97B/博B)F1为母本,(博B/桂2)F1为父本杂交制保后,再与博A测交并连续回交转育而成的优质软米型不育系。该不育系农艺性状优良,花粉败育彻底,育性稳定,异交习性好,配合力强,米质优,于2013年6月通过广西农作物品种审定委员会田间技术鉴定。     

茄子新品种海丰长茄1 号的选育

海丰长茄1 号是以双单倍体（DH）株系02-QP-19 为母本，优良自交系A-40 为父本配制而成的长茄一代杂种。平
均始花节位为第9 节，植株生长势强，叶片绿色，叶脉、叶柄和主茎的颜色为紫色，植株半开张类型。果实平均纵径31.5
cm，横径4.5 cm，果皮紫黑色，有光泽，果实顶部尖，平均单果质量220 g，VC 和VP 的含量分别为23.2 mg·kg^-1 和0.035%。
一般每667 m² 产量5 000 kg 左右。适宜北京、吉林和黑龙江等地区露地种植。     

Comparisons of Photosynthetic Characteristics in Relation to Lint Yield Among F_1 Hybrids,Their F_2 Descendants and Parental Lines of Cotton

We compared the photosynthetic characteristics in relation to yield of two F1 cotton hybrids（Shiza 2-F1 and Xinluzao 43-F1）, their parental lines（NT2, H2 and 4-14） and their F2 descendants at different growth and development stages. The two F1 exhibited heterobeltiosis in net photosynthetic rate（Pn） by 8.1-52.1%, canopy apparent photosynthetic rate（CAP） by 8.2-57.6% and canopy respiration rate（CR） by 3.0-78.7% during the growing season. They also exhibited mid-parent heterosis by 2.0-5.2% in leaf chlorophyll content（SPAD） during the late growth and development stages. Regression analysis showed that both parents contributed to increase in Pn, SPAD and CAP in the F1. A low CR in the F1 matched a low CR of the parental line. Photosynthetic characteristics in the F2 were mainly dependent upon the magnitude and degeneration rate of the F1. Mid-parent heterosis in CAP and in CR during the late growth and development stage reduced the degeneration of the F2. Average dry matter accumulation was 10.7-34.7% higher in the parental lines of Xinluzao 43-F1 than in the parental lines of Shiza 2-F1. Heterobeltiosis in dry matter accumulation was 7.0-23.1% greater for Xinluzao 43-F1 than for Shiza 2-F1. Dry matter accumulation in the F1 was affected by either the dry matter accumulation of parents or heterobeltiosis. Dry matter accumulation in the F2 was mainly influenced by dry matter accumulation in the F1. The yields of the two F1 were 39.1-46.3% higher than their respective parents and 26.4-45.9% higher than that of the conventional cultivar Xinluzao 33. The yields of the two F2 were 9.2-12.8% higher than the parents and 14.9-27.4% higher than that of Xinluzao 33. The photosynthetic production and yield of the F1 and F2 were higher than that of their parents. The increases in Pn and CAP of the F1 and F2 were dependent on the photosynthetic characteristics of their parents. It is thus concluded that the photosynthetic performance, light use efficiency and yield of the F1 can be improved by using at le     

番茄新品种--莎冠

莎冠番茄是由青岛市农业科学研究院培育的中早熟抗病耐贮的一代杂种，2012年9月通过全国蔬菜品种鉴定委员会的鉴定。 该品种属于无限生长类型，生长势强，总状花序，普通叶形，中果型红果，平均单果质量107.5克，无青肩，可溶性固形物含量4.6%，品质好，整齐度高，平均商品果率91.3%，适应性广，抗病性高，抗枯萎病、病毒病、叶霉病、筋腐病等。高产，产量达15吨/公顷以上。耐贮藏，室温下（25℃）货架期在21天以上。     

温室黄瓜新品种中农33号的选育

中农33号是以自交系09676和12173为父母本配制的黄瓜一代杂种。植株生长势强,耐低温弱光性好。果实商品性好,颜色深绿、有光泽,腰瓜长约35 cm,瓜粗3.4 cm左右,瓜把长约4.5 cm,心腔较小,果肉为淡绿色。白刺、密,瘤小,无棱。高抗WMV,中抗CGMMV、枯萎病、黑星病。早熟性好,持续结果及丰产优势明显。温室长季节栽培每667 m~2产量高达10 000 kg以上。适宜日光温室和春棚栽培。     

茄子新品种京茄13号的选育

京茄13号是以优良自交系1156为母本,以1125为父本配制而成的长茄一代杂种。早熟,始花节位为第10节,植株长势强,节间短。果实顺直,长筒状,果长25~30cm,横径5~6cm,果皮黑亮,连续坐果性强,每667m2平均产量为4240kg,低温耐受性强,适合北方保护地栽培。     

加工型辣椒新品种‘艳椒426’

加工型辣椒新品种‘艳椒426'是以‘754(2)-1'为母本,‘750-1'为父本配制而成的一代杂种。植株生长势强,平均株高102.0 cm,始花节位15节。果实朝天,单生,小尖椒形,果长6.0 cm,果宽1.0 cm,果肉厚0.1 cm,平均单果质量4.8 g,生物学成熟果红色。皮薄,味辣。中晚熟,平均鲜椒产量为25.5 t·hm~(-2)。对病毒病和疫病具有较强抗性。     

优质粳稻三系不育系辽11A的选育

辽11A是以BT型细胞质不育系屉锦A为母本,以通过人工制保,在珍珠粳/LS2//辽粳294///B9后代中选育的高柱头外露率、株型理想、优质、高抗的保持系辽11B为父本,经过测交和连续回交转育而成的粳稻不育系,具有抗病能力强、柱头外露率高、优质等特点,2013年通过辽宁省农村经济委员会鉴定。     

杂交水稻三系不育系吉田A原种优质高产扩繁技术

吉田A是连山壮族瑶族自治县农业科学研究所选育的野败型籼稻三系不育系,具有米质优、配合力强、开花习性好、异交结实率高等特点。根据吉田A的特征特性和多年的繁殖实践,总结了其优质高产扩繁技术,以期为制种户提供技术参考。