نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه شهید چمران اهواز
2 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران
3 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران.
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The present study was conducted to investigate the effects of soil compaction on soil water availability indicators and some growth characteristics of sugarcane plants. A total of nine compaction treatments were defined, including three levels of agricultural tools pressure and three levels of soil moisture. Soil samples were collected at the beginning of the growing season from the topsoil and subsoil layers to measure the usual physical properties as well as the indices. Soil water availability indicators including plant available water (PAW), least limiting water range (LLWR) and integral water capacity (IWC) were calculated. The soil moisture curve was measured using a pressure plate and membrane devices and the soil resistance curve was measured using a manual penetrometer in the laboratory. Plant growth indicators included straw collar diameter (D), straw height (H), sheath relative water content (RWC), and shoot weight (Y). The results of ANOVA showed that both the simple effects of compaction factors and interaction effects of compaction soil moisture on LLWR and IWC indicatores in the soil surface layer were significant (p<0.05). The lowest values of LLWR and IWC were observed in the plot with the highest compaction and soil moisture (W3P3), with values of 0.026 and 0.017 cm3.cm-3, respectively. The lowest Y was also observed in the treatment of high compaction and high soil moisture (W3P3), with a value of 38 t.ha-1. It was suggested that the next research should scientifically and accurately determine the optimal value of soil water for each class of soil texture.
کلیدواژه‌ها [English]
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