Results 1 to 10 of about 397 (102)
为揭示生长在不同地下水埋深和土壤质地的胡杨实生幼苗根系的不同生长适应策略,以胡杨实生幼苗为试验材料,设置30(A1),60(A2),90 cm (A3)3个地下水埋深处理,砂土(B1)、砂壤土(B2)和黏壤土(B3)3种土壤质地处理,研究了塔里木河流域地下水埋深和土壤质地对胡杨(Populus euphratica)实生幼苗根系生长及构型的影响。结果表明:(1)地下水埋深的增加,可促进胡杨幼苗根系形态的发育和根系生物量的积累,胡杨幼苗扎根深度、根系总长度 ...
丁晓雪, 赵成义, 曾勇, 马晓飞
doaj
采用盆栽试验的方法,研究不同磷添加量(0,20,80 mg/kg)和土霉素添加量(0,40,160 mg/kg)对小麦和紫花苜蓿幼苗生物量及根系发育的影响。结果表明:所有水平土霉素处理中,20,80 mg/kg磷处理的小麦地上部生物量均比不加磷时高,分别高22.7%~34.1%,10.0%~30.0%和9.1%~18.3%。除160 mg/kg土霉素加80 mg/kg磷的处理外,所有处理的苜蓿根生物量均小于不加磷和土霉素的对照。小麦的根长和根表面积随着土霉素添加量的增加总体上呈减少的趋势。总体来看 ...
李颖鑫 +5 more
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以矮化苹果砧木M9T337幼苗为试材,设置4个氮水平(N 0,150,300,450 mg/kg,分别以N0、N1、N2、N3表示)和2个磷水平(P2O5 100,200 mg/kg,分别以P1、P2表示),研究了氮磷配施对苹果砧木幼苗生长、土壤无机磷形态转化和磷素吸收利用的影响,以期为果园磷肥高效利用提供参考依据。结果表明,不同氮磷配施显著影响M9T337幼苗生物量及根系形态,以N2P2处理效果最佳,其次为N1P2处理。植株磷素积累量及磷肥利用率分别在N2P2、N2P1处理下达到最大值 ...
张鑫 +6 more
doaj
Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source
Pometia pinnata demonstrated life‐stage‐specific genetic responses to landscape features, with asymmetric gene flow patterns and population recovery following historical bottlenecks, revealing complex topographic and demographic influences on forest genetic structure.
Madhuparna Chatterjee +5 more
wiley +1 more source
本研究以贵州六盘水市野生山桐子种子为实验材料,采用不同吸收剂量的60Co-γ射线对种子进行处理,调查60Co-γ射线辐照对山桐子幼苗生长过程中的成苗率及1年生山桐子的地径、苗高、叶长、叶宽、叶面积、叶周长、二级根长度、二级根粗度等16个生长指标及叶绿素含量的影响。结果表明,与对照相比,60Co-γ射线辐照处理显著增加了山桐子成苗率,并对山桐子幼苗生长具有显著影响(p<0.05),吸收剂量为120 Gy时,山桐子幼苗地径和苗高均最大,分别比对照增加了36%和68%;随着吸收剂量增加,二级根长度 ...
许 恒 +6 more
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Read the free Plain Language Summary for this article on the Journal blog. Abstract In the Southwest Australian Biodiversity Hotspot, the greatest plant species diversity tends to occur on the most phosphorus (P)‐impoverished soils. Many plant species in this P‐impoverished environment release root carboxylates that mobilise soil P which is a more ...
Xue Meng Zhou +5 more
wiley +1 more source
以"M9T337"苹果幼苗为试材,利用15N同位素示踪技术,研究了等氮量投入下,不同有机物料单施及混施对苹果幼苗生长、15N吸收利用及土壤特性的影响。试验设置CK (只施用化学肥料,不施有机物料)、S (秸秆)、B (生物炭)、F (牛粪)、SB (1/2秸秆+1/2生物炭)、SF (1/2秸秆+1/2牛粪)、FB (1/2牛粪+1/2生物炭)、SFB (1/3秸秆+1/3牛粪+1/3生物炭)8个处理。结果表明:施用有机物料可以促进苹果幼苗的生长,其中SFB处理植株鲜重、株高、茎粗、叶面积 ...
王璐 +6 more
doaj
Staghorn ferns are among the most highly valued ornamental plants but several species experience major extinction threats. Here we establish a DNA barcoding reference dataset to support reliable identification of cultivated staghorn ferns to secure species identity of individuals at all life stages that are used in ex situ and in situ conservation of ...
Kaikai Wang +6 more
wiley +1 more source
Large seeds as a defensive strategy against partial granivory in the Fagaceae
Large seeds dispersed by scatter‐hoarding granivores, such as Fagaceae acorns, tolerate partial damage to achieve higher dispersal efficiency. By demonstrating that seed size itself acts as a defensive trait, the findings provide new insights into seed size diversity and evolution, highlighting how large seeds counterbalance reserve losses to evade ...
Si‐Chong Chen +5 more
wiley +1 more source

