Document Type : Research Paper
Author
Senior expert of the watershed department of the Agricultural and Natural Resources Research and Training Center of Zanjan Province, Iran
Abstract
In this study,the effect of application super absorbent material on growth of rain-fed trees in managed rainwater harvesting systems was investigated and application or non-application of superabsorbent as main treatment, three management treatments including: no change at the level of system,Trench collection and vegetation cover of the system level and Semi-insulated treatment as sub-treatments and Was examined with randomized complete block design two fruit tree including almond and apricot as sub-treatments in a split plot design. During the design, tree growth indices including changes in diameter, height and canopy of seedlings were measured in different treatments of rain water harvesting.Results show that the systematic surface treatment of rain water harvesting systems with vegetation had the lowest diameter and height growth in almond and apricot seedlings and the insulated treatment had the highest diameter and height growth. This is indicative of the effect of creating a system of rain water harvesting systems with different cover levels to produce different runoff amounts and as a result the difference in diameter and height growth of the seedlings planted. Significant level differences between treatments and blocks in the diameter growth rate of almond and apricot seedlings in the year in experimental treatments with and without super absorbent at less than 1% error indicates that the operation performed in each of these treatments.But result of the variance analysis showed that the presence or absence of superabsorbent hadn't significant effect on their growth. So whether significant in plant growth in the use of superabsorbent materials is not a general and permanent state and depends on the climatic conditions of the area, the type of soil and its texture, the type of plant and even the topographical and slope conditions of the planting site. Therefore, any plants or seedlings should be evaluated and evaluated in the area.
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