نوع مقاله: پژوهشی
نویسندگان
1 فارغ التحصیل دوره دکتری دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران.
2 استادیار مؤسسه تحقیقات خاک و آب.
3 دانشیار مؤسسه تحقیقات ثبت، کنترل و گواهی بذر.
4 استاد دانشگاه آزاد اسلامی واحد علوم تحقیقات.
5 کارشناسی ارشد زراعت دانشگاه تربیت مدرس.
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Alkalinity of soils in many cultivated areas of corn in Iran prevents the accessability of nutrients, particularly
phosphore (P), by the plant. Application of solphur (S) and its subsequent oxidation which is usually accompayning with a reduction of soil PH will enhance the absorbability of P and most micronutrient solubles in the soil. Today, low price of phosphorus sources such as apatite and composts can be taken into consideration as phosphorus fertilizers for plant nutrients in agriculture. These sources could promote absorbable phosphors in the alkaline soils and later on taken by the plant. However, we studied effects of changing PH and increasing phosphorus solubles in the soil on yield production of a corn single cross 301. The experiment was a factorial based on a randomized complete block design with three replications and carried out at the Research Station of Soil and Water Research Institute, Karaj, Iran, in 2005. The experiment consisted of four factors, each at two levels such as: urban compost (0 and 10 t/ha), Phosphate-solubilizing microorganisms (PSB) as check and bacteria, apatite (0 and 1 t/ha) and phosphor (P) inoculated with oxidative Thiobacillus bacteria (0 and 4 t/ha).. The results showed that the highest yield (9600 kg/ha) was obtaind for the application of compost and Bacillus megaterium treatment. For the factors in which only apatites was used, yielded the lowest value (6937 kg/ha) as compared to the check (7700 kg/ha). Indeed, interaction effects of compost and Bacillus megaterium was significant (P <0.05) for yield. Application of apatite in alkality soils not only did not increase phosphorus solubles, but had a negative effect on the soil characteristics and plant growth. It is suggested that application of compost and Bacillus megaterium promote the accessability of plant to nutrients like phosphor and consequently will increase yield production of corn in the field.
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