Survey on the treatment of the seed amount, the transplanting time of black zira (Bunium persicum) bulbs from nursery to field with the best cultivation pattern

The present study was conducted at Khorassan Agricultural Research Center in order to determine the amount of seeds in nursery and the best transplanting date for black zira (Bunium persicum) bulbs from nursery to field and to find out the best cultivation pattern in the field. Treatments consisted of six seed rates (20, 60, 100, 180 and 220 kg/ha) which were sown on November 1996. Results revealed that 60 kg/ha was the best seed rate to produce bulbs of two years old with highest weight (1.98 g). In 1999, the experiment was laid out in factorial under a randomized complete block design. The factor of the cultivation patterns was included of three levels as square, lozenge and rectangle. The transplanting date of two years old black zira bulbs from nursery to field was conducted in three seasons (summer, fall and winter) in the form of RCBD. The distance between rows was considered in both the rectangular pattern and lozenge 25 cm and in the square pattern 12.24 cm. The results showed that the best transplanting date of the black zira bulbs was summer due to bulb dormancy and considering optimum yield and biological yield. Medicinal plants are a valuable natural resource and regarded as potentially safe drugs. They have been playing an important role in alleviating human sufferings by contributing herbal medicines in the primary health care systems of rural and remote hilly areas where the of population depends on folklore and traditional system of medicines. In this research, I try to find out some agronomic character to produce black zira in the fields and protect rangelands.