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Nassiri, Mehdi; Elgersma, A.

doi:10.1023/a:1021528732218

Cited by 20 publications

(4 citation statements)

References 32 publications

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“…The positive effects of N fertilisation on CGR and herbage production of grass swards were extensively demonstrated in previous studies [8,41,47,48] and confirmed by our results. A higher N uptake and higher NC in the plant and leaf material at higher N application rates was also confirmed by previous studies [7,38,49].…”

Section: Effect Of N Application Rate On Herbage Production and Pftsupporting

confidence: 92%

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How Does Nitrogen Application Rate Affect Plant Functional Traits and Crop Growth Rate of Perennial Ryegrass-Dominated Permanent Pastures?

et al. 2021

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High doses of nitrogen (N) fertiliser input on permanent pastures are crucial in terms of N surplus and N losses. Quantitative analyses of the response of plant functional traits (PFT) driving crop growth rate (CGR) under low N input are lacking in frequently defoliated pastures. This study aimed to understand the significance of PFTs for productivity and N uptake in permanent grasslands by measuring dynamics in tiller density (TD), tiller weight (TW), leaf weight ratio (LWR), leaf area index (LAI), specific leaf area (SLA), as well as leaf N content per unit mass (LNCm) and per unit area (LNCa) in perennial ryegrass (Lolium perenne)-dominated pastures, in a simulated rotational grazing approach over two consecutive growing seasons. Annual N application rates were 0, 140 and 280 kg N ha−1. The phenological development of perennial ryegrass was the main driver of CGR, N uptake and most PFTs. The effect of N application rate on PFTs varied during the season. N application rate showed the greatest effect on TD, LAI and, to a lesser extent, on SLA and LNCm. The results of this study highlight the importance of TD and its role in driving CGR and N uptake in frequently defoliated permanent pastures.

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Section: Effect Of N Application Rate On Herbage Production and Pftsupporting

confidence: 92%

“…The observed values of each PFT were within ranges of results reported by previous studies investigating SLA [19,41,42], TD [11,43], LAI [19,41,42,44] and LNC a [8]. The dynamics in TW coincided with the development of MSC.…”

Section: Seasonal Dynamics In Cgr Nitrogen Uptake and Pftssupporting

confidence: 87%

How Does Nitrogen Application Rate Affect Plant Functional Traits and Crop Growth Rate of Perennial Ryegrass-Dominated Permanent Pastures?

et al. 2021

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“…In previous studies reported that white and red clover as cover crops have a residual effect corresponding up to 90 kg ha −1 mineral nitrogen fertilizer (Breland, 1996;Schroder et al, 1997;Garand et al, 2001). However, in mixcropping of wheat with clover, the clover proportion often becomes small due to generating dense main crops and thus its effect on intercropped crop or its residual effect on the subsequent crop will also reduce (Nassiri and Elgersma, 2002).…”

Section: Reproductive Growthmentioning

confidence: 99%

Comparing the effect of organic and chemical nutritional management and intercropping with clover on the quantity and quality of different wheat (Triticum aestivum L.) cultivars

NAZARIAN

Fallahi²,

Jami

et al. 2022

Not Sci Biol

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Optimal availability of nutrients, particularly nitrogen (N), from authorized resources is one of the most important issues in organic agriculture. Intercropping forage legumes with cereal crops may be a way of providing ecological services such as providing N for companion or following crops by biological N fixation. To determine the effect of biological, chemical, and organic fertilization on the quality and quantity of ten different wheat cultivars, an experiment was conducted during two successive growing seasons. The three experimental factors (F1, F2, F3) were: mix cropping with Persian clover (Trifolium resupinatum L.) (F1: biological N fixation, as control); chemical nitrogen fertilizer (F2: 100 kg ha-1, urea), and organic cow manure (F3: 40 t ha-1). The vegetative growth parameters improved by F1 and F2 treatments. The F2 had the highest values of spikelet and seed number per spike, 1000-grain weight, and seed yield, followed by F1. The cv. ‘Kabul-13’ was the best among all tested cultivars in terms of almost all reproductive parameters. The highest seed yield was obtained by F2 ‘Kabul-13’ (8.02 t ha-1), and F1 ‘Kabul-13’ (7.26 t ha-1). By considering seed yield, ‘Chont-1’ and ‘Kabul-13’ were more suitable to be intercropped with clover. The effect of experimental factors was not significant on seed potassium and phosphorus contents, while percentage of seed protein improved by F3 (13%), and ‘Mugawim’ (13.59%). The highest protein yield was gained by F2 and F1 (820 and 650 kg ha-1) and also by ‘Kabul-13’ (850 kg ha-1). Overall, mixed cropping of wheat and clover can be suggested as a possible alternative for nutrients providing in wheat production in low input agro-ecosystems.

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“…Light, temperature, water, and mineral nutrition are essential resources regulating forage grass regrowth and yield (Lee et al, 2021;Nambiar, 1977;Seo et al, 2013). Nassiri and Elgersma (2002) found that nitrogen fertilizer has a growth-limiting effect on ryegrass regrowth. Nitrate nitrogen (NO 3 À ) can stimulate root to secrete cytokinin and improve plant photosynthesis, thereby promoting Italian ryegrass regeneration (Wang et al, 2013(Wang et al, , 2020.…”

Section: Introductionmentioning

confidence: 99%

Increasing Italian ryegrass (Lolium multiflorum Lam.) regrowth via inoculation with an ammonia‐oxidizing bacterial strain

Wang

et al. 2022

Grassland Science

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This study aimed to investigate the effect of a soil ammonia‐oxidizing bacterial (AOB) strain on Italian ryegrass (Lolium multiflorum Lam.) regrowth. Potted Italian ryegrass was used as test material. We isolated and screened an AOB strain from the soil for use in inoculation of other soils to increase nitrification. The sequence of the two isolated and screened AOB strains (S2_8_1 and S2_7_25) were 100% similar to that of Ensifer sesbaniae and Acinetobacter pittii. The nitrification inhibitor 3,4‐dimethylpyrazole phosphate (DMPP) was also added to the soil to inhibit nitrification. The experimental design involving the inoculation of the soils with the AOB strain included seven treatments: (1) regrowth without any additives, (2) regrowth with blank enrichment medium added to the soil, (3) regrowth with S2_8_1 strain inoculation, (4) regrowth with S2_7_25 strain inoculation, (5) regrowth with DMPP added to the soil, (6) regrowth with DMPP added to the soil and with S2_8_1 strain inoculation, and (7) regrowth with DMPP added to the soil and with S2_7_25 strain inoculation. Compared with regrowth treatment without any additives, the regrowth treatment with S2_8_1 and S2_7_25 inoculations significantly increased leaf biomass by 23.5–48.6%, the leaf net photosynthetic rate by 27.9–48.5%, the rhizosphere soil nitrification rate by 43.0–144.2%, leaf cytokinin concentrations by 23.7–24.9%, and xylem sap cytokinin concentrations by 32.5–43.2%. The increase of nitrate nitrogen content in rhizosphere soil induced by S2_8_1 and S2_7_25 promoted the transfers of cytokinin from roots to leaves, resulting in the increase of cytokinin concentration in leaves. This increase in leaf cytokinin concentrations improved Italian ryegrass regrowth. However, the S2_8_1 and S2_7_25‐induced increases in the nonrhizosphere soil nitrification rate were not closely related to Italian ryegrass regrowth. The tested AOB strains have considerable potential to increase Italian ryegrass regrowth.

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Untitled

Cited by 20 publications

References 32 publications

How Does Nitrogen Application Rate Affect Plant Functional Traits and Crop Growth Rate of Perennial Ryegrass-Dominated Permanent Pastures?

How Does Nitrogen Application Rate Affect Plant Functional Traits and Crop Growth Rate of Perennial Ryegrass-Dominated Permanent Pastures?

Comparing the effect of organic and chemical nutritional management and intercropping with clover on the quantity and quality of different wheat (Triticum aestivum L.) cultivars

Increasing Italian ryegrass (Lolium multiflorum Lam.) regrowth via inoculation with an ammonia‐oxidizing bacterial strain

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