摘要
对于荒漠植物不同生长期生物量分配和化学计量比的研究有助于深入了解荒漠植物的功能结构,更好掌握环境对植物的生存影响。本研究选取古尔班通古特沙漠4种一年生荒漠草本植物沙蓬(Agriophyllum sqarrosum(L.) Moq.)、雾冰藜(Bassssia dasyphylla(Fisch. et Mey.) O. Kuntze)、角果藜(Ceratocarpus arenarius L.)和碱蓬(Suaeda glauca(Bge.) Bge.)对比研究了4种生物量分配与N、P化学计量学随植物生长的变化。结果显示:(1) 4种荒漠植物生物量积累配过程中,根冠比随生长季的延长逐渐降低。地上、地上生物量相关生长关系表明,角果藜为等速→异速的变化过程,沙蓬从采样初期至末期的变化过程为异速→等速生长,而沙蓬和碱蓬的相关生长指数相反,分别为异速→等速→异速、等速→异速→等速的变化格局;(2) 4种植物N、P含量随生长期的延长逐步降低。在整个生长季节4种植物的N与P含量的变化趋势均为相似。(3)植物N、P含量间达到正相关显著,除沙蓬和雾冰藜的N∶P之外其余指标分别与植物的地上、地下生物量及总生物量间呈负相关显著,而根冠比、相关生长指数与化学计量特征间未达到显著水平,表明了二者较弱的相关性。研究表明,4种荒漠草本植物生物量与化学计量特征的相关性不大,说明化学计量比并不是影响植物生物量及生活策略的主要因素,而更多是受植物自身遗传特性的影响。同时也体现了荒漠草本植物在养分匮乏的条件下,形成了自身独特的生理生态特征,且具有相对稳定的适应特性。
The study on the biomass allocation and stoichiometric ratio of desert plants in different growth periods can help to understand the functional structure of desert plants and better grasp the influence of environment on the survival of plants.In this study, four annual desert herbs Agriophyllum sqarrosum (L.) Moq., Bassssia dasyphylla (Fisch.Et Mey.) O.Kuntze, Ceratocarpus arenarius L.and Suaeda glauca (Bge.) Bge.were selected.The changes of the distribution of biomass, N and P stoichiometry with plant growth were compared.The results showed that:(1)During the process of biomass accumulation and distribution of four kinds of desert plants, the root crown ratio decreased gradually with the extension of growing season.The growth relation of aboveground and aboveground biomass showed that the change process of the quinoa was isokinetic to isokinetic, while the change process from the initial stage to the final stage of the sample was isokinetic to isokinetic, while the correlation growth index of the apsarum and the apsarum was opposite, which was the change pattern of isokinetic to isokinetic, isokinetic to isokinetic to isokinetic.(2)The N and P contents of the four plants decreased gradually with the extension of growth period.The variation trend of N and P content of the four plants was similar throughout the growing season.(3)The contents of plant N and P reached a significant positive correlation, and the other indexes except N:P of desiccant and fog ice quinoa showed a significant negative correlation with the aboveground and underground biomass and total biomass of plants, while the root crown ratio, correlation growth index and stoichiometric characteristics did not reach a significant level, indicating a relatively weak correlation between them.Study shows that the four kinds of desert plant biomass little correlation with characteristics of chemical measurement and explain stoichiometric ratio is not the main factors influencing the plant biomass and life strategy, but more is affected by the plant's own genetic traits, but also embodies the desert herbaceous plants under the condition of lack of nutrients, formed its own unique physiological and ecological characteristics, and has a relatively stable adaptive traits.Research shows,There was little correlation between biomass and stoichiometric characteristics of the four desert herbaceous plants, indicating that stoichiometric ratio was not the main factor affecting biomass and living strategies of plants, but was more influenced by the genetic characteristics of plants themselves.At the same time, it also reflects that desert herbaceous plants have formed their own unique physiological and ecological characteristics under the condition of nutrient deficiency, and have relatively stable adaptation characteristics.
作者
郭浩
庄伟伟
李进
GUO Hao;ZHUANG Wei-Wei;LI Jin(School of Life Sciences,Xinjiang Normal University,Xinjiang special environmental species protection and regulation biological laboratory,Plant stress biology laboratory in arid area.,Urumqi 830054)
出处
《植物研究》
CAS
CSCD
北大核心
2019年第3期421-430,共10页
Bulletin of Botanical Research
基金
新疆师范大学重点实验室招标课题资助项目(XJNUSYS112017A02
XJNUSYS112017A01)
新疆师范大学重点学科-生物学学科招标课题资助项目(18SDKD0203)
国家自然科学基金项目(41763009)~~
