Naslov
Nitrogen and phosphorus content, test weight and yield variations of wheat grain as affected by cropping intensity

Autori
Bujan, Marija ; Svečnjak, Zlatko ; Vedrina-Dragojević, Irena ; Vitali, Dubravka ; Čebušnik, Ana

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

Izvornik
Book of abstract, 2nd International and 19th Croatian congress of technologists for post-harvest technology "Zrnko 2006" / Krička, T. - Zagreb : Agronomski fakultet Sveučilišta u Zagrebu, 2006, 94-94

Skup
2. međunarodni i 19. hrvatski kongres za posliježetvenu tehnologiju "Zrnko 2006"

Mjesto i datum
Tuheljske Toplice, Hrvatska, 22.11.2006. - 23.11.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
wheat; quality; cultivar; nitrogen; phosphorus; cropping intensity

Sažetak
Public concerns over the potential environmental hazards of intensive agriculture have renewed an interest in low-input agricultural practices. Thus, a two year study was conducted to determine the influence of cropping intensity, namely the low-input and high-input production levels, on the nitrogen (N) and phosphorus (P) content, test weight and grain yield of three winter wheat cultivars widely grown in Croatia. Growing conditions significantly affected grain yields averaging 6641 kg ha-1 in the first growing season and 8295 kg ha-1 in the following year. Despite an associated increase in the 1000-kernel weights, the use of low-input production level brought about a significant decrease in the grain yields, test weights and grain N contents in all three cultivars tested by an average of 18, 1%, 1.5% and 22, 6%, respectively, when compared to the high-input production system. These reductions in grain quality traits were consistent in both growing seasons, regardless of variations in grain yields among tested cultivars. Grain N content under low-input production system averaged 17, 1 g kg-1 only, which may limit its use for breadmaking. In contrast, grain P content was not affected by cropping intensity or growing season and averaged 4.7 g kg-1 across all treatments. However, cultivars significantly differed for this trait and cultivar Renan, which had the highest N content was simultaneously characterized by the lowest P content in the grain. Interestingly, a strong negative correlation (P = -0.74*) existed between 1000-kernel weights and grain P content because cultivars with heavier kernels showed a tendency toward lower P content in the whole grain. When compared to high-input system, the low-input production practices for winter wheat crop were associated with significant decrease in test weight, grain yield and N content, but had no important effect on grain P content.

Izvorni jezik
Engleski

Znanstvena područja
Farmacija

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