True Potato Seed (TPS) Seedling Tuber Production Technology in Pakistan

摘要

Three different experiments were conducted for three years to develop true potato seed (TPS) mini tuber production technology in the country. In three year average data the germination percentage (71.9%), number of tubers per meter square (334.2) and yield of seeding tubers/m² (2841.1 g) was at the top when TPS was soaked 24 h before sowing. The lowest germination percentage (38.8%), tubers number/m² (270.5) and yield of seedling tubers/m² (853.9 g) was obtained in dry sowing. The 24 h soaking gave an average of 85.3%, 18 h soaking yielded 72.4%, 30 h soaking produce 35.1% and 12 h soaking gave 18.3% more germination than dry sowing. The 24 h soaking produce 23.5%, 18 h soaking gave 19.9%, 30 h soaking yielded 13.2% and 12 h soaking gave 4.8% more numbers of seedling tubers/m² than dry sowing. On the average basis 24 h soaking produced 232.7%, 18 h soaking gave 130.8%, 30 h soaking yielded 119.7% and 12 h soaking produced 23.6% more seedling tuber weight/m² than dry sowing. Germination percentage (73.9%) and number of tubers per meter square (483) were at the top in 15th October sown plot where as maximum seedling tuber /m² (2785.6 g) was yielded by the 1st October sown crop. The lowest germination percentage (27.9%) and tuber number/m² (222.3) were obtained in the 15th September sown crop where as the lowest yield of seedling tubers/m² was produced by the Ist. November sown plots (1822.2 g). Maximum germination percentage (79.8%), seedling tubers/m² (326.1) and yield of seedling tubers/m² (1835 g) was obtained in plot where soil and leaf manure was mixed in 1:1 ratio, where as minimum germination percentage (41.6%), seedling tubers/m² (254.3) and yield of seedling tubers/m² (684 g) was recorded where TPS was sown in simple soil. On an average basis from three years data soil + leaf manure (1:1) media produced 168.3%, soil + FYM (1:1) media gave 84.6% and soil + silt (1:1) media yielded 31.3% more seedling tuber weight/m² than simple soil sown plots. Hence TPS sowing in Punjab is recommended on 15th October and onward. and soaking of TPS is recommended for 18 to 24 h before sowing . The sowing of TPS is recommended in Soil + leaf manure or soil + FYM in 1:1 ratio. These recommendations not only improve germination and number of seedling tuber/m² but also the weight of seedling tubers per unit area too.