Effect of Zeolite and Foliar Application of Selenium on Growth, Yield and Yield Component of Three Canola Cultivar under Conditions of Late Season Drought Stress

Abstract

In order to study effect of zeolite soil application and selenium foliar application on growth, yield and yield components of three canola cultivar under conditions of late season drought stress an experiment was conducted in two growing season in 2006 and 2007. Site study was field of Seed and Plant Improvement Institute, Karaj, Iran. The experimental design was a Randomized Complete Block arrangement in factorial split plot with three replications. Irrigation factors were chosen at two levels, included complete irrigation and irrigation holding at stem elongation stage. Zeolite was used at two levels, non application and 10 ton per hectare. Also selenium was sprayed at three concentrations, 0, 15 and 30 gr per liter from sodium selenate. These treatments were randomized in main plots while three canola cultivars ('Zarfam' , 'Okapi' and 'Sarigol') were randomized in sub plots. The results showed that, main effects of different irrigation levels have significant effect on all traits and drought stress decreased significantly all traits. Foliar application of selenium had significant and additive effect on plant height, number of pods in plant, number of seeds in pod, seed yield, biological yield, harvest index and oil yield. There was significant difference between zeolite application and non application on all traits except oil percent and harvest index. It was shown that canola cultivars were different in all of studied traits. Comparison of means showed that, four critical traits that is seed yield, biological yield, harvest index and oil yield were affected by experimental treatments. Different cultivars have different responses under unlike conditions inside upon traits. Under different treatment conditions especially drought stress, zeolite and selenium application have positive and significant effect on traits related to yield. In finally, zeolite and selenium application in dry lands that are exposure to late season drought stress can be helpful for yield improvement and prevent of decreasing yield.

Selenium reduces cadmium uptake and mitigates cadmium toxicity in rice

“…Similar results were observed on ryegrass [11], lettuce [10], and potato [9]. Recently, Zahedi et al [15] and Pazoki et al [16] found that Se, as foliar application improves yield of rapeseed under drought stress condition. However, apart from the results on UV-or drought-stressed plants and Cd-stressed rape and wheat mentioned above, no information is available on Cd-Se interaction in rice.…”

Arbuscular mycorrhizal fungi, selenium, sulfur, silica-gel and biochar reduce arsenic uptake in plant biomass and improve nutritional quality inPisum sativum

“…Se translocated into grains as well as increases yield and antioxidant activity in food crops [71,73,75]. Likewise, Se application increases biomass growth and yield of pumpkin ( Cucurbita pepo L.), lettuce ( Lactuca sativa L.) and canola ( Brassica napus L.) crops as well as enhances photosynthetic pigments and antioxidant activities under abiotic stress [52,74,76,77,78]. Similarly, Se increase biomass growth in BARI released pea genotypes in this study (Figs 1–4).…”

Interactive effects of planting method and zeolite application on yield attributes of chickpea (Cicer arietinum L.) in dryland conditions

“…According to the results of present study, plant height of chickpea can be increased through the application of zeolite in conventional flat planting system. The increase in plant growth due to zeolite application may be attributed to the positive effects of zeolite on the availability of water and essential nutrients for the plant (Rehakova et al, 2004;Mahmoodabadi et al, 2009;Zahedi et al, 2009).…”