The influence of plant propagation method and planting density on the productivity of potato meristemplants
2000
Kotkas, K. | Saerekanno, M. (Estonian Agricultural Univ., Tartu (Estonia))
The potato, a vegetative propagated crop, requires healthy disease-free planting material. At present the in vitro plantlets and micro tubers are commonly used for speeding up multiplication at the start of seed program. The effectiveness, energy expenditure, and the degree of pollution of the environment differ much in each method. The technology created in EVIKA for multiplication of disease-free potato plants in plastic rolls and growing of the first tuber generation in the field has justified itself well in practice. The multiplied plants are not always with same productivity and seed tubers with uniform size. In the test-fields of the first generation the influence of 3 multiplication methods, 5 planting density and 3 genotypes on the number and size of seed tubers were studied. The amount of tubers per plant and size were statistically credible influenced by the method of propagation and the planting density. By increasing the planting density in the field the number of tubers of tubers per plant and size were decreased. The plants obtained in vitro had 6,8...14,7 and plants in plastic rolls 3.6...6.7 tubers per plant. The optimal planting density 20...25x70 cm was resulted for all tested varieties
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