نتایج جستجو برای: f0 fm
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شوریخاکوآبآبیاریازمهمترینعواملمحدودکنندهتولیدگیاهانزراعیدرمناطقخشکونیمهخشکدنیااست. باتوجهبهافزایشروزافزونشوریآبوخساراتناشیازآنبرتولیداتگیاهی،بررسیاثراتشوریبرگیاهانزراعیوشناساییارقاممقاوم،امری مهممیباشد.برای بررسی اثر شوری بر کارایی فتوسنتزی رقمهای جو، گیاهچههای رقمهای دشت، سهند، لیسیوی و صحرا در محیط هیدروپونیک کشت شده و با غلظتهای مختلف شوری نمک کلریدسدیم(50 و 100 میلیمولار) تیمار شدند...
In a greenhouse experiment aimed to compare drought resistance, photosystem II efficiency was evaluated using chlorophyll fluorescence parameters and chlorophyll content of four pistachio (Pistacia vera L.) rootstocks based on a completely randomized design (CRD) as factorial with drought treatment (PEG + Hoagland solution) at four levels (0, -0.5, -1 and -2 MPa) and four pistachio rootstocks(A...
A series of experiments investigated the influence of harmonic resolvability on the pitch of, and the discriminability of differences in fundamental frequency (F0) between, frequency-modulated (FM) harmonic complexes. Both F0 (62.5 to 250 Hz) and spectral region (LOW: 125-625 Hz, MID: 1375-1875 Hz, and HIGH: 3900-5400 Hz) were varied orthogonally. The harmonics that comprised each complex could...
The Ideal Membership Problem is as follows: given f0, f1, . . . , fm ∈ K[x1, . . . , xn], is f0 ∈ 〈f1, . . . , fm〉, where 〈f1, . . . , fm〉 denotes the ideal generated by the fi? An equivalent formulation is: are there q1, . . . , qm ∈ K[x1, . . . , xn] such that f0 = ∑m i=1 qifi? We will solve this question by using Gröbner bases. That is, a Gröbner basis is a “nice” representation of an ideal,...
iran is mainly situated in a dry climate part of the world. due to the limiting and scarce water resources, crop production in the country is increasingly facing water shortages. a field experiment was conducted to investigate the impact of irrigation regimes on growth, chlorophyll fluorescence and grain yield of maize in 2006 at the research farm, college of agriculture, isfahan university of ...
to evaluate the effects of methanol and drought stress on chlorophyll fluorescence parameters, chlorophyll and relative water content in sugar beet, a study was conducted in 2008 in maahdasht (karaj, iran). aqueous solutions of 0 (control), 7, 14, 21, 28, 35% (v/v) methanol with each solution containing 0.2% glycine and a second factor, namely drought stress (irrigation after 70% depletion of a...
برنج (oryza sativa l.) تأمینکننده غذای نیمی از مردم جهان است و شوری در برخی مناطق، موجب کاهش عملکرد این گیاه میگردد. به منظور توسعه کشت برنج در مناطقی با آب یا زمینهای شور، میزان کلروفیل، شاخصهای فلورسانسکلروفیل و عملکرد دانه برخی از ارقام برنج تحت تاثیر تنش شوری، در تابستان 92-1391 در مزرعه دانشکده کشاورزی دانشگاه یاسوج، مورد ارزیابی قرار گرفتند. آزمایش بهصورت کرتهای یکبار خردشده و در ...
Rice (Oryza sativa L.) is providing food of half of the world population, and in some regions salinity stress reduces yield of this plant. In order to develop planting of rice in regions with saline water or fields, chlorophyll rate, chlorophyll fluorescence indices and grain yield of some rice cultivars were evaluated in summer, 2012, at the farm of college of Agriculture, at Yasouj University...
In order to determine the effects of water deficit stress, nitrogen fertilization and zeolite on chlorophyll fluorescence, pigments, trigonelline content and seed yield in, a split factorial experiment was laid out in a randomized complete block design with three replications. Five irrigation regimes were randomly applied to the main plots. Subplots included six treatments and consisted of a fa...
The aim of this study is to evaluate the effects of water deficit stress on chlorophyll fluorescence (CF) characteristics of photosystem II (PSII) and pigment contents in two rootstock seedlings (Pistacia atlantica L. and P. khinjuk L.). Three levels of soil water potential (Ψs) was used, including WWD (-0.05 MPa), MWD (-0.7 MPa) and SWD (-1.5 MPa). It was found that water stress increased the...
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