Урожайность конопли в зависимости от агротехнических приемов возделывания

Abstract

The research carried out in 2005-2013 by a bookmark of field experience in the territory of the Chuvash Agricultural Research Institute. The experience was laid on three-factor scheme. Factor A is fertilizers: 1. Without fertilizer when the soil humidity is 40, 60 and 80%; 2. N60P45K45 when the soil moisture is 40, 60 and 80%; 3. N120P90K90 when the soil moisture is 40, 60 and 80%; 4. N180P135K135 when the soil moisture is 40, 60 and 80%. Factor B is decapitation: 1. Sort Diana without decapitation; 2. Sort Diana with decapitation; 3. Sort Ingreda without decapitation; 4. Sort Ingreda with decapitation. Factor C is the conditions of seeds reproduction: 1. Negative selection + decapitation + watering; 2. Negative selection + no decapitation + watering; 3. No negative selection + decapitation + watering; 4. No negative selection + no decapitation without + watering; 5. Negative selection + decapitation + no watering; 6. Negative selection + no decapitation + no watering; 7. No negative selection + decapitation + no watering; 8. No negative selection + no decapitation + no watering (control). The calculated doses of fertilizers were applied according to the experimental scheme. The size of each experimental plot is 10 to 10 meters (100m2). Replication - 3-fold. The decapitation in phase of 3 pair of leaves allows us to “grow 2-6 branches, where one grew up”. The optimal dose of nitrogen is 200 kilogramm, and phosphorus and potassium - 100-150kilogramm per 1 hectare so that to wake up in decapitated plants in phase of 3 pairs of leaves, axillary vegetative buds and the formation normal reproductive developed 5-6 branches. At the same time, during the phase of the three pairs of leaves the soil moisture should be 75-80% of full moisture capacity to full bloom. The total length of the time inflorescences technical maturity equals 263.2 - 282.2 cm, and the seed weight of 26.3-28.2. During decapitation the reproductive number of branches increases, compared to the control, to 3.5-3.8 times. The decapitation in combination with negative selection and vegetation watering produces up to 8.4 m stems, 2.5 tons of seeds and 2.2 tons of fiber from each hectare of crop.