Water-Saving Irrigation and N Reduction Increased the Rice Harvest Index, Enhanced Yield and Resource Use Efficiency in Northeast China

Agronomy, Journal Year: 2024, Volume and Issue: 14(6), P. 1324 - 1324

Published: June 19, 2024

For agricultural production, improving the rice harvest index (HI) through management practices is a major means to enhance water and N utilization efficiency yield. Both irrigation regimes nitrogen (N) rates are important aspects of practices. However, it unclear how HI affected by N. This study aimed clarify mechanism underlying response N, explore most suitable water-saving reduction ensure A two-year (2021~2022) field experiment was conducted on Mollisols in Northeast China. In this experiment, nine treatments were performed, involving three (flooded irrigation, controlled “thin-shallow-wet-dry” irrigation) (110, 99, 88 kg/ha). The agronomic traits transfer photoassimilates under different observed studied; HI, WUE, NUE calculated analyzed. highest achieved with 99 kg/ha rate, at values 0.622 0.621 2021 2022, respectively. Controlled (CI) an appropriate rate increased proportion productive tillers, dry matter non-structural carbohydrates (NSCs), sugar–spikelet ratio, grain–leaf leaf area (LAI) during heading–flowering stage. subsequent analysis indicated that main reason for increase ratio high yield increasing thousand-grain weight. present suggested not only led fertilizer resource savings but also improved characteristics growth enhanced transport capacity. Thus, these have enormous potential Therefore, regulating methods should be considered strategy

Language: Английский

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Plant height defined growth curves during vegetative development have the potential to predict end of season maize yield and assist with mid-season management decisions

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: June 29, 2024

Abstract Precision farming has been developing with the intention of identifying within field variability to adjust management strategies and maximize end season yield profitability minimize negative environmental impacts. The development quick, easy, low cost methods quantify level variation is essential successful implementation precision agriculture at scale. Temporal plant height growth rates collected unoccupied aerial vehicles mounted red, green, blue sensors have potential predict grain yield, which could facilitate mid-season decisions. Image-based data was weekly from commercial maize fields in three growing seasons assess relationship variation. Plant height, rate, had variable relationships depending on time point environment. Models developed using temporal traits predicted a up r = 0.7, though insufficient water affected prediction accuracy one due limited representation drought environments model development. In future, more stress environments, such as drought, this method for high across range conditions. This study demonstrates derive vegetative patterns variations, application making

Language: Английский

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Characteristics Associated with Genetic Progress in Grain Yield in Wheat (Triticum aestivum L.)

International Journal of Agronomy, Journal Year: 2024, Volume and Issue: 2024(1)

Published: Jan. 1, 2024

Increasing the yield potential of cultivars can contribute to solving problems climate change and increase in world population. The objectives this study were variation 60 wheat ( Triticum aestivum L.) genotypes estimate genetic progress agronomic characters varieties released Mexico period from 1966 2015. hypothesis was that increases are result number grains per surface unit biomass. established six experimental stations National Institute Agricultural Forestry Livestock Research states Guanajuato, Sonora, Chihuahua, Jalisco, Sinaloa, Baja California, Mexico. Phenology, yield, its components measured. treatment design alpha lattice with two replications. location genotype showed highest P ≤ 0.01) California COLIBRI/MONARCA, 7309 5966 kg·ha −1 . average gain 23.8 ·year grain weight rate 0.21 g year. During period, there no plant height, heading days, harvest index, square meter, ears meter. recent lines due

Language: Английский

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Effects of nitrogen doses on stomatal characteristics, chlorophyll content, and agronomic traits in wheat (Triticum aestivum L.)

PeerJ, Journal Year: 2024, Volume and Issue: 12, P. e18792 - e18792

Published: Dec. 24, 2024

It is very important to determine the chlorophyll content (SPAD) and nitrogen (N) requirement in order increase seed yield nutritional quality of wheat. This research was carried out with three N doses (0, 50, 100 kg ha −1 ) nine wheat cultivars (Alpu-2001, Soyer-02, Kate-A1, Bezostaja-1, Altay-2000, Müfitbey, Nacibey, Harmankaya-99 Sönmez-2001) during 2-years field condition according factorial randomized complete block design replications. In this study, dose (N50), increased by 13%, plant height 10.8%, 1,000 weight 10.5% compared control plants (N0). The from 50 gave lower rates same criteria (11.7%, 11.4%, 10.3%, respectively). However, spike number per plant, spikelet spike, length showed statistically significant differences between varieties. Boost caused a without application. flag leaf area index were determined at growth times (1 st time; early, 2 nd middle end flowering, 3 rd 10-day interval). Chlorophyll significantly ( p < 0.01) affected dose, variety time. As increased, it higher both N0. had highest (30.22%) 1 time decreased as period progressed. doses, varieties their interactions effects on index. (41.9 cm Bezostaja-1 treatment. effect found abaxial adaxial stomata width-length epidermal cells. width than N0 levels. width- obtained dose. concentration stomatal density increased. varied 19% 36%. lowest appeared variety. result, characteristics, content, agronomic traits increasing doses.

Language: Английский

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