锥花丝石竹人工栽培丰产技术

锥花丝石竹（Crypsophila oldkamianaMiq．）别名：霞草、丝石竹,产于山西、甘肃、新疆等地。1～2年生草本植物,高达90cm,全株无毛,稍被白粉,性强健,多分枝,向四面开展,叶片对生。披针形至线状披针形．多数小花组成疏散的圆锥花序,花白色,景观似霞;萼短钟形,长2mm,5裂,花瓣5,长椭圆形,小花梗为萼的2～3倍,花期6～8月。花顶生枝梢。     

紫薇扦插育苗技术要点

紫薇又名满堂红,千屈菜科植物,落叶灌木或小乔木,高可达7米,树冠不整齐,树皮光滑,淡褐色,嫩枝四棱;叶对生,椭圆形至柜圆形,长3-7厘米;圆锥花序顶生,变种较多,花有红色、紫色,乳白色,桃红色等多种;花期长,从6—7月开始到9—10月,故名百日红;     

浅议水稻白叶枯病的防治方法

水稻属须根系,不定根发达,穗为圆锥花序,自花授粉。一年生栽培谷物。秆直立,高30～100厘米。叶二列互生,线状披针形,叶舌膜质,2裂。圆锥花序疏松;小穗长圆形,两侧压扁,含3朵小花,颖极退化,仅留痕迹,顶端小花两性,外稃舟形,有芒;雄蕊6;退化2花仅留外稃位于两性花之下,常误认作颖片。颖果。原产亚洲热带。是世界主要粮食作物之一。我国水稻播种面占全国粮食作物的1／4,     

红叶石楠栽培技术要点

红叶石楠为常绿多枝丛生灌木或小乔木,新梢及嫩叶鲜红色,老叶革质,叶表深绿具光泽,叶背绿色,光滑无毛,顶生伞房圆锥花序,小花白色,花期4月上旬至5月上旬。红色犁果,夏末成熟,可持续挂果到来年春天。生长速度快,萌芽性强,耐修剪,可根据园林造景需要修剪培育各种造型,在园林     

小叶丁香栽培技术

小叶丁香属落叶灌木,叶卵形或椭圆形卵状,长1～2cm,少数3～4cm,宽0.8～1.5cm,少数2.0～2.5cm,全缘,有缘毛,表面密被短柔毛或无毛,背面灰绿色,主脉稍密被褐色或白色髯毛;叶柄长5～10mm,被短毛或近无毛。圆锥花序侧生,疏松,长5～15cm;花冠筒细长,圆锥形,长约1cm,花冠裂片卵状披针形,先     

鸭茅

1．品种简介。禾本科鸭茅属多年生草本。须根系，茎直立或基部膝曲，疏丛型，高70-120cm，基部叶片密集下披，长20-30cm，宽0．7-1．2cm。圆锥花序，开展，长5-20cm。小穗聚集于分枝的顶端，含2-5朵小花。种子黄褐色，长卵圆形，千粒重1-1．2g。年可刈割2-3次，每667m2可产鲜草能性2000-3000kg，干草600-800kg。     

Detecting QTLs for rice panicle length under different N levels

Ｒｉｃｅｐａｎｉｃｌｅｌｅｎｇｔｈｉｓａｑｕａｎｔｉｔａｔｉｖｅｔｒａｉｔｃｏｎｔｒｏｌｌｅｄｎｏｔｏｎｌｙｂｙｇｅｎｅｔｉｃｆａｃｔｏｒｓｂｕｔａｌｓｏｂｙｅｎｖｉｒｏｎｍｅｎｔｃｏｎｄｉｔｉｏｎｓ，ｅｓｐｅｃｉａｌｌｙｂｙｎｉｔｒｏｇｅｎｓｕｐｐｌｙｌｅｖｅｌ．Ｉｔｉｓｓｕｐｐｏｓｅｄｔｈａｔｇｅｎｅｓｏｆｒｉｃｅｐａｎｉｃｌｅｌｅｎｇｔｈｃｏｕｌｄｂｅｆｕｌｌｙｅｘｐｒｅｓｓｅｄｕｎｄｅｒｓｕｆｆｉ ｃｉｅｎｔＮｓｕｐｐｌｙａｎｄｂｅｒｅｓｔｒｉｃｔｅｄｂｙｌｏｗＮｓｔｒｅｓｓ．Ｄｅｔｅｒ…     

Elongation of the Uppermost Internode for Changxuan 3S,a Thermo- Sensitive Genic Male Sterile Rice Line

Changxuan 3S, a thermo-sensitive genic male sterile （TGMS） rice line with eui gene, is derived from the TGMS rice line Pei＇ai 64S by irradiation with 350 Gy of ^60Co γ-ray. To elucidate the uppermost internode elongation of the TGMS line with eui gene, Changxuan 3S and its parent Pei＇ai 64S were used to study the effects of temperature on panicle exsertion. At 24℃, the uppermost internode of Changxuan 3S elongated the fastest from the 4^th day before flowering to 0 day （flowering）, being 2.1-fold as that of Pei＇ai 64S, whereas it elongated slowly during the 12^th day to the 4^th day before flowering and the 1^st to the 3^rd day after flowering. The uppermost internode of Changxuan 3S exserted from the flag leaf sheath at 22℃, 24℃ and 26℃, and the length of elongated uppermost internode increased with the decreasing temperatures. At 28℃, though the panicles of Changxuan 3S were still enclosed in the leaf sheath, the degree of panicle enclosure was significantly lower compared with Pei＇ai 64S. Cytological studies on Changxuan 3S showed that the uppermost internode elongation was attributed to the increase of cell number and cell elongation, and the latter was more significant. Moreover, the numbers of outermost and innermost parenchyma cells and the cell length of the uppermost internode reduced with the increasing temperatures.     

巴西木兰州放花

1996年,我从一盆栽有3株的柱状巴西木上掰了3枝大小不等的枝桠,按原盆的形式扦插“复制”了一盆巴西木。而今,复制的这盆巴西木分别长到了50厘米、110厘米、115厘米,茎干被宽大下垂的长叶片覆盖,满盆青翠,生机盎然。2007年10月底,其中的一株顶端抽出了棕红色的花蕾,随之出现了10节腋生圆锥花序。几乎每个花序轴的下端都凝结着一滴品莹剔透的液体,     

紫丁香育苗技术

紫丁香,属木犀科,丁香属,又名丁香、华北紫丁香。灌木或小乔木,高可达4m．枝条粗壮无毛。叶广卵形,通常宽度大于长度,宽5-10cm,端锐尖,基心形或截形,全缘,两面无毛。圆锥花序长6—15cm花萼钟壮,有4齿;花冠紫色,端4裂开展,花药生于花冠筒中部或中上部。蒴果长圆形,顶端尖,平滑。花紫色,4月下旬开放。