Hamid Zare Abyaneh; Farzaneh Heidari; Gholamreza Heidari; mehdi jovzi
Abstract
In this pot experiment, the effects of three levels of zero (A0), three (A1) and five gram (A2) aquasorb superabsorbent per kg of soil, three levels of 70 (W1), 85 (W2) and 100 (W3) percent of irrigation requirements and two levels of 75 (F1) and 100 (F2) percent of nitrogen fertilizer requirements were ...
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In this pot experiment, the effects of three levels of zero (A0), three (A1) and five gram (A2) aquasorb superabsorbent per kg of soil, three levels of 70 (W1), 85 (W2) and 100 (W3) percent of irrigation requirements and two levels of 75 (F1) and 100 (F2) percent of nitrogen fertilizer requirements were studied on some traits of bell pepper plant. The experiment was factorial based on randomized complete block design with 18 treatments and three replications. The results showed significant effect of superabsorbent and irrigation treatments on all components except stem diameter. Among the superabsorbent treatments, the highest fruit yields (666.2 gr) and water productivity (12.36 kg/m3) were obtained in A2 treatment. Among the irrigation treatments, the highest values of the mentioned functions were obtained in the W3 and W1 treatments with 621.81 g and 10.57 Kg/m3 respectively. The effect of fertilizer treatments on shoot weight, root and fruit yield was significant. The highest fruit yield was 638.70 g in F2 treatment. The interaction of two variables of water with superabsorbent with effect on fresh and dry weight of shoot and root and on yield and water productivity yielded the highest fruit yield (916.65g) and productivity (14.55kg/m3) in A2W3 treatment. The interaction effects of superabsorbent and fertilizer showed that the highest yield and water productivity were equal to 670.51 grams and 12.44 kg / m3 in A2F2 treatment. The interactions of water and fertilizer showed that the highest yield and water productivity were 625.59 g in W3F2 and 12.32 kg/m3 in W1F2 treatment. The interaction of three superabsorbent, water and fertilizer variables on all studied traits was not significant.
M. Gheysari; M.M. Majidi; seyed majid mirlatifi; M.J. Zareian; S. Amiri; S.M. Banifatemeh
Abstract
The response of root to water stress is one of the most important parameters for researchers. Study of growth and distribution of root under different irrigation managements helpsresearchersto a better understanding of soil water content, and the availability of water and nutrition in water stress condition. ...
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The response of root to water stress is one of the most important parameters for researchers. Study of growth and distribution of root under different irrigation managements helpsresearchersto a better understanding of soil water content, and the availability of water and nutrition in water stress condition. To investigate the effects of four levels of irrigation under two different deficit irrigation managements on the root length of maize, a study was conducted in 2009. Irrigation managements included fixed irrigation interval-variable irrigation depth (M1) and variable irrigation interval-fixed irrigation depth (M2). Maize plants were planted in 120 large 110-liter containers in a strip-plot design in a randomized complete block with three replications. Root data sampling was done after root washing in five growth stages. The results showed that the effect of irrigation levels on root length was significant (P
S. Akhavan; M. Shabanpour; M. Esfahani
Abstract
In order to study the effect of soil compaction on root and shoot growth of wheat plants (Shahriar variety), a greenhouse pot experiment was conducted in Guilan University. The study design was factorial with completely randomized in three replications. Treatments included three compaction levels; (normal ...
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In order to study the effect of soil compaction on root and shoot growth of wheat plants (Shahriar variety), a greenhouse pot experiment was conducted in Guilan University. The study design was factorial with completely randomized in three replications. Treatments included three compaction levels; (normal compaction, compaction of ten percent and twenty percent) and two type of soil texture (clay and sand) will include 18 pots. Soil mechanical resistance index measured with the device influence the resistance gauge significant differences among treatments indicated. Root and shoot traits measured included plant fresh weight and total shoot dry weight, leaf dry weight (LDW), stem dry weight (SDW), root fresh weight (RFW), root dry weight (RDW), leaf area (LA), root area (RA), root volume (RV), root length (TL), root dry weight ratio of shoots, leaf area to root ratio (LA/RA), root length density (RLD), root surface area density (RSD), root mass density (RMD), dry root mass density (DRMD) and nitrogen content of roots, significant difference in the levels indicated treatments. The results showed that increasing the compaction of soil are affected characteristics related to the shoot and root of wheat plants, and twenty percent of the compaction (influence resistance 1200 KPa in the clay soil and 762.76 Kpa in the sandy soil) is limited roots and shoots growth than the natural soil.
