Proceedings Volume 2010 (format .pdf) - SimpBTH

of the last third period of sowing (25-30 October), which corresponds to themaximum amount of post-harvest residues (1913.3 kg / ha). As regard the tuberformationthe optimal is the sowing during the period 10-15 October, the numberof tubers is 36.7 pcs / plant.In the terms of II test the most favorable conditions for development ofmixed agro-phitocenosis are created at a ratio legume: cereal 60:40 and 50:50 -1070.1 respectively formed and 885.1 kg / ha post-harvest residues. Increasing thelegume component share participation (70:30 and 80:20) in the sowing rate at theexpense of cereals leads to decreasing the values of the above mentioned index byon average with 56.4 and 40.3%.Although the mixed crops are planted in different ration of the legume andcereal component in the sowing rate, grain component develops better thanlegumes, which is found in studies of other authors (Kostov and Pavlov, 1999). Onaverage with 121.4 and 311.4% the quantity of post-harvest residues and theweight of the root mass in triticum secalr is higher than this of pea. No significantdifferences observed in the number of tubers formed of a plant under the influenceof different involvement of pea in sowing rate.Table 1. The effect of different periods of sowing and sowing rate ratios of mixed sowingpea: triticum-secale on tuber-formation, root mass formation and plant residues content –on average for the periodVariants25-30.0910-15.1025-30.1050:50Crop componentsRoot dry weight,g / plantTuber formation,tuber number /plantPost-harvestresidueskg/haI sampling – sowing termspea 1.13 18.45 430.7triticum-secale 2.47 - 387.2pea 2.42 36.70 346.9triticum-secale 2.70 - 279.1pea 0.34 33.30 457.9triticum-secale 6.35 - 1455.4II sampling – sowing terms ratiopea 1.05 43.5 111.3triticum-secale 5.87 - 773.860:40pea 1.52 41.7 841.2triticum-secale 3.56 - 228.970:30pea 0.98 39.7 268.9triticum-secale 4.40 - 380.080:20pea 1.36 43.2 218.6triticum-secale 1.50 - 364.9LSD 5% 0.16 3.84 57.24100