本文選題：宿根花卉　切入點：抗寒性　出處：《山東農(nóng)業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：露地宿根花卉依靠宿存的根系越冬,生長強健,適應性較強,使用經(jīng)濟方便,一次種植可多年觀賞,觀賞期不一,可周年選用,是街道、工礦區(qū)、土壤貧瘠地美化的優(yōu)良花卉。隨著城市綠化建設的日新月異,宿根花卉越來越被園林工作者廣泛應用,由于宿根花卉能夠美化凈化環(huán)境,增強人們的生活情趣,對提高城市的綠化景觀和環(huán)境質(zhì)量大有益處,是園林中應用很廣泛的一類花卉。本文以泰安地區(qū)引種栽培的宿根福祿考(Phlox paniculata L.),八寶景天(Hylotelephium erythrostictum(Miq.)H.Ohba),黃菖蒲(Iris Pseudocorus L.),荷蘭菊(Aster.novi-belgii),穗花婆婆納(Veronica spicata L.),火炬花(Kniphofia uvaria)6種重要宿根花卉試驗材料,觀察記錄其物候?qū)W特性,測定電導率并擬合logistic方程求低溫半致死溫度(LT50),研究低溫脅迫對可溶性糖含量、可溶性蛋白含量、游離脯氨酸含量、POD活性等生理生化指標的影響,同時運用隸屬函數(shù)法對6個花卉品種的抗寒性進行綜合評價,主要研究結(jié)論如下:1.宿根福祿考、穗花婆婆納、火炬花萌芽期較早,一般為4月上旬,荷蘭菊萌芽較晚,一般為4月下旬;黃菖蒲開花最早,為5月上旬,宿根福祿考、穗花婆婆納、火炬花一般在6月上旬開花,荷蘭菊開花最晚,為9月上旬;火炬花花期較長,黃菖蒲、荷蘭據(jù)花期較短;黃菖蒲枯萎較早,火炬花枯萎較晚。2.隨著低溫脅迫的不斷加劇,該6種宿根花卉的電導率呈現(xiàn)有規(guī)律的變化趨勢,為“S”型曲線。測定電導率并擬合logistic方程求LT50,計算出宿根福祿考、八寶景天、黃菖蒲、荷蘭菊、穗花婆婆納、火炬花的低溫半致死溫度分別為-30.38℃、-29.88℃、-28.11℃、-29.43℃、-24.73℃、-24.51℃。從低溫半致死溫度高低來看,6種宿根花卉的抗寒性強弱順序為:宿根福祿考八寶景天荷蘭菊黃菖蒲穗花婆婆納火炬花。3.本研究發(fā)現(xiàn),POD活性、游離脯氨酸含量、可溶性蛋白含量、可溶性糖含量與6種宿根花卉的抗寒性呈一定的正相關性,電導率與6種宿根花卉的抗寒性呈一定的負相關性;鑒于宿根花卉生理狀況受到外界環(huán)境因素和自身因素方面的影響,變化十分復雜,所以各種生理指標應該綜合考慮才能更為準確的評價植物抗寒能力的高低。4.方差分析結(jié)果顯示,6種宿根花卉之間的POD酶活性、游離脯氨酸含量、可溶性蛋白含量、可溶性糖含量、電導率差異顯著;在不同低溫條件下的POD酶活性、可溶性蛋白含量、游離脯氨酸含量、可溶性糖含量、電導率之間差異顯著;5.利用隸屬函數(shù)法綜合分析各生理指標,得出6種宿根花卉的抗寒性強弱順序為:宿根福祿考八寶景天荷蘭菊黃菖蒲穗花婆婆納火炬花,與LT50判斷的結(jié)果基本一致。
[Abstract]:The root flowers of the open field live through the winter on the root system, which has strong growth, strong adaptability and convenient use. It can be seen for many years at a time, with different viewing periods, and it can be chosen annually. It is a street, an industrial and mining area. With the rapid development of urban greening, the root flower is more and more widely used by garden workers, because it can beautify and purify the environment and enhance people's interest in life. To improve the city's green landscape and environmental quality, Phlox paniculata L., Hylotelephium erythrosticum Miq.H. Ohbaa, Iris Pseudocorus L., Aster.novi-belgii, Veronica spicata spicata L., and Kniphofia uvaria)6 were introduced and cultivated in Tai'an area. The phenological characteristics were observed and recorded, the electrical conductivity was measured and the logistic equation was fitted to calculate the low temperature half-lethal temperature (LT50), and the effects of low temperature stress on the contents of soluble sugar, soluble protein, free proline, and other physiological and biochemical indexes were studied, such as the content of soluble sugar, the content of soluble protein and the activity of free proline. At the same time, the cold resistance of 6 flower varieties was evaluated by membership function method. The main conclusions were as follows: 1. Generally on late April; the earliest flower of Acorus calamus was early May, the root of Furoc, the panicle of mother-in-law, the flower of Torchia generally bloomed in early June, the latest flower of the Dutch chrysanthemum was early June, and the floral period of the torch was longer, Acorus calamus. In the Netherlands, the flowering period is shorter, the wilting time of Acorus calamus is earlier, and the wilting time is late. 2. With the increasing of low temperature stress, the electrical conductivity of the 6 species of perennial flowers shows a regular change trend. For the "S" curve, the conductivity was measured and the logistic equation was fitted to calculate LT50. The semi-lethal temperature at low temperature is -30.38 鈩，

本文編號：1587517