Naslov
Green beans (Phaseolus vulgaris L.) root nodules number after treatment with nettle leaf extract

Autori
Perincic, Branka ; Brkljača, Mia ; Ban, Dean ; Romić, Marija ; Goreta Ban, Smiljana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Sustainability challenges in agroecosystems / Jug, Irena ; Đurđević, Boris ; Brozović, Bojana - Osijek : Hrvatsko društvo za proučavanje obrade tla (CROSTRO), 2017, 24-24

ISBN
978-953-7871-62-8

Skup
3rd International Scientific Conference

Mjesto i datum
Osijek, Hrvatska, 19.06.2017. - 21.06.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
fertilization, legumes, organic farming, symbiotic N fixation, Urtica dioica L.

Sažetak
Nitrogen fixation by soil bacteria could be used as a source of plant available nitrogen without fuel consumption. Symbioses between N fixing bacteria and legumes occur under favourable soil conditions regarding pH, salinity, amount of water and presence of nutrients, while excess soil N inhibits nodulation. Nettle leaf extract, commonly used as source of nitrogen in organic farming, is applied in green beans production to test its effects on root nodulation. The experimental plants were sown on August 9 th 2016. Nettle dry leaves (183 g/10 L of water) macerated 24 hours (short) and applied foliarly, and the same amount of nettle dry leaves macerated 14 days (long) and applied by watering, were compared to plots fertilized with urea or without N fertilization. Six plants per treatment were sampled during last harvesting date, on September 11 th 2016, for measurements of shoot dry weight, root dry weight and number of nodules per each plant. Nodules number per plant was the highest after application of nettle extract of long maceration (20.3 ±9.9) compared to nettle extract of short maceration (11.3±10.8), urea (5.0 ±6.0) and untreated plants (4.5±3.9). Root dry weight (g/plant) was the highest after application of nettle extract of short and long maceration (0.95±0.26 and 0.90±0.18, respectively) than after urea application and untreated plants (0.57±0.20 and 0.63±0.21, respectively). Urea treated plants had greater shoot/root ratio than nettle treated plants of short and long maceration (12.19±6.74 and 9.48±2.29, respectively), while untreated plants were similar to all treatments. Nodules number per root weight (g / plant) was the highest after application of nettle extract of short and long maceration (22.7±10.3 and 12.9±13.3, respectively) than after urea application and untreated plants (8.7±9.2 and 7.2±6.3, respectively) but the difference was of low significance ( p =0.064). Shoot dry weight was similar for all treatments. Nodules number was negatively correlated to shoot/ root ratio (-0.57, p<0.05). The results indicate the positive effect of nettle extract on beans nodulation and root growth. The effect of urea to nodulation was similar to untreated plants except it enhanced shoot growth. The research must be continued to confirm the positive effect of nettle extract on green beans nodulation.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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