Hamzeh Khanjani afshar; Mojtaba Jafarzadeh Kenarsari; Mehrdad Chaichi; amin farnia
Abstract
To investigate the effect of zinc and potassium application on some morphological traits and yield of wheat (Triticum aestivum L.) under drought stress, a split-factorial layout based on a randomized complete block design (RCBD) with three replicates were carried out at the experimental farm of the Research, ...
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To investigate the effect of zinc and potassium application on some morphological traits and yield of wheat (Triticum aestivum L.) under drought stress, a split-factorial layout based on a randomized complete block design (RCBD) with three replicates were carried out at the experimental farm of the Research, Education and Extension Center of Agriculture and Natural Resources of Hamadan during 2017-2018. The main plot included irrigation levels (normal and water stress) and the subplot included two factors of foliar application of potassium (K) and zinc (Zn) fertilizers. Potassium fertilizer from K2O source (40%) including 2 L/ha at three levels; I) without fertilizer (control sample), II) leaf spray at the beginning of booting, III) leaf spray after pollination, and zinc fertilizer from water-soluble zinc source (10%) including four liters per ha in three levels; I) without fertilizer (control sample), II) leaf spray at the beginning of booting, III) leaf spray was used after pollination. The results of the analysis of variance showed a significant difference between treatments in all studied traits. Significant differences in all of the traits were observed under stress and normal irrigation. Co-application of potassium and zinc fertilizers compared to the control increased grain yield (4.5%) and RWC (5.8%) evaluated morphological indices under stress conditions.To investigat
Hamzeh Khanjaniafshar; Mehrdad Chaichi; Mojtaba Jafarzadeh Kenarsari; amin farnia
Abstract
Drought, being the most common abiotic stress, is a major factor in crop yields as it limits crop production on a global basis. To evaluate the effects of foliar application with potassium (K) and zinc (Zn) in the pollination stage on morphological and physiological characteristics of wheat under water ...
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Drought, being the most common abiotic stress, is a major factor in crop yields as it limits crop production on a global basis. To evaluate the effects of foliar application with potassium (K) and zinc (Zn) in the pollination stage on morphological and physiological characteristics of wheat under water stress conditions, a split-factorial layout based on a randomized complete block design (RCBD) with three replicates have been carried out at the experimental farm of the Research, Education and Extension Center of Agriculture and Natural Resources of Hamadan during 2017-2018. The main plot includes irrigation levels (normal and water stress) and the subplot, two factors of foliar application of potassium (K) and zinc (Zn) fertilizers. Potassium fertilizer from K2O source (40%) includes 2 liters per ha at three levels; I) without fertilizer (the control), II) leaf spray at the beginning of booting, and III) leaf spray after pollination. Also, zinc fertilizer from water-soluble zinc source (10%) includes four liters per ha in three levels: I) without fertilizer (the control), II) leaf spray at the beginning of booting, and III) the use of leaf spray after pollination. The results of the analysis of variance show a significant difference between treatments in all studied traits. Significant differences in all of the traits are observed under stress and normal irrigation. Co-application of potassium (K) and zinc (Zn) fertilizers, compared to the control, has increased evaluated morphological indices of HI (21%), grain yield (52%), total yield (29%), and TKW (25%) under stress conditions. Therefore, according to the results, the use of K and Zn fertilizers as a foliar application at the beginning of booting reduces the harmful effects of drought stress on the plant, increasing the yield and morphological characteristics of wheat.
Samaneh Asadi Sanam; Mohsen Zavareh; Hasan Shokri_Vahed; Parisa Shahinrokhsar
Abstract
A randomized complete block design with three replications was performed in Rice Research Institute of Iran, Rasht in 2008, to find the effect of supplement foliar application of nitrogen and potassium on ’Daylam‘ hybrid rice grain yield, its components and grain protein percentage. Foliar ...
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A randomized complete block design with three replications was performed in Rice Research Institute of Iran, Rasht in 2008, to find the effect of supplement foliar application of nitrogen and potassium on ’Daylam‘ hybrid rice grain yield, its components and grain protein percentage. Foliar application of 20 kg nitrogen (5 percent N) and 15 kg potassium (3 percent K2O) in different pre-anthesis stages was considered as treatments. Foliar application of distilled water was considered as control. Results showed that the grain yield and biological yield were increased in treatments which nitrogen and potassium was applied at pre-anthesis stages compared to control treatment. Foliar fertilization of nitrogen in maximum tillering stage had the highest effect on number of tiller per plant and grain number per panicle. The highest percentages of fertile tillers were related to foliar application of nitrogen at both maximum tillering and booting stages. Foliar application of nitrogen at maximum tillering and booting stage significantly increased grain protein content by 12.1 percent which it was 8.3 percent greater than control treatment. Result also showed that a significant and positive correlation exists between grain yield with biological yield and percentage of panicle fertility. Overall, it was concluded that maximum tillering stage is the best pre-anthesis phonological stage for foliar application of nitrogen and potassium on cv. Daylam hybrid rice.