IBA和NAA不同浓度复配对金丝皇菊扦插生根的影响

为研究金丝皇菊枝条扦插生根基质中添加生长激素IBA和NAA促进生根的最佳复配浓度和浸泡时间。设置IBA 0、200、400、600 mg/L,NAA 0、100、200、300 mg/L,浸泡时间0.5、1.0、1.5、2.0 h的L16(43)三因素四水平正交试验。结果表明IBA和NAA单用时,金丝皇菊枝条扦插的平均根系效果指数分别为2.28和1.53。IBA 200 mg/L和NAA 200 mg/L复配液浸泡金丝皇菊枝条2.0 h,其根系效果指数为3.90,生根效果最好;IBA 600 mg/L、NAA300 mg/L复配液浸泡金丝皇菊0.5 h,对生根有一定的抑制作用,其他处理较清水浸泡0.5 h对生根均有一定的促进作用。IBA 200 mg/L和NAA 200 mg/L复配,浸泡2 h,为最佳复配浓度和浸泡时间,过大的复配浓度对生根有抑制作用。

尖孢镰刀菌及欧文氏杆菌复合侵染引起的半夏腐烂病研究

以家种健康半夏、发毛半夏和腐烂半夏为材料,对引起半夏腐烂病的尖孢镰刀菌和欧文氏杆菌进行分离、提纯、镜检、回接和药敏试验。结果在家种健康半夏和发毛半夏中分离出尖孢镰刀菌,在发毛半夏和腐烂半夏中分离到欧文氏杆菌。通过对2种菌回接,半夏接种尖孢镰刀菌腐烂病发病率为0,发芽率75%;接种欧文氏杆菌腐烂病发病率为20%,发芽率60%;而先接种尖孢镰刀菌,过3 d后再接种欧文氏杆菌的腐烂病发病率为90%,发芽率20%。药敏试验和盆栽试验发现,尖孢镰刀菌对三唑类农药戊唑醇敏感,欧文氏杆菌对乙蒜素敏感,并具有很好的防治效果。综上,半夏腐烂病是由尖孢镰刀菌和欧文氏杆菌复合侵染引起。

小拱棚栽培半夏需水规律及干物质动态变化研究

为研究小拱棚栽培半夏需水规律和干物质积累动态,以清水县主栽半夏为试验材料,设置高、中、低3种土壤湿度,开展盆栽试验。结果表明:小拱棚栽培半夏需水规律表现出前期小、中期大、后期小的特点,以中土壤湿度(出苗初期土壤湿度为55%~70%,齐苗期、快速生长期、珠芽生根发芽期土壤湿度为70%~85%,灌浆期和成熟期土壤湿度为55%~70%)为最优处理,半夏需水临界期为珠芽生根发芽期;半夏块茎的干物质积累表现为播种至快速生长期持续减少、珠芽生根发芽期至成熟期持续增加,珠芽的干物质积累表现为从发芽后持续增加,根系和叶片的干物质积累表现为出苗初期至快速生长期持续增加、珠芽生根发芽期至成熟期持续下降。

Dazzling Brilliance Mingles Emotions with ObjectiveExistence to Clear One's Mind——Appreciation of Chen Chengyi's Traditional Chinese Paintings

I got acquainted with Mr Chen Chengyi not long ago,but my admiration for him grows silently,especially for his artistic achievements.At the exhibition held on May 23,2014,I was fortunate to enjoy his dazzling paintings of different styles and contents.It really enlightened me.Now,I am so willing to share my

Rosted Leaves Redder Than February Flowers——Thoughts after Reading Mr. Yu Honglin's Painting Collection

A day in mid-May this year,Mr.Yu Honglin came to the Oriental Painting and Calligraphy House with his latest published painting and calligraphy collection book.It makes me very excited to share his artistic achievement with you.Mr Yu’s creation style is skillful,confi dent,substantial and vivid.In my opinion,both painting and calligraphy pay attention to brushwork.Meaningful lines are the original starting point of arts.Use Mr.Yu’s