Published in Scientific Papers. Series B, Horticulture, Volume LXI
Written by Ana Cornelia BUTCARU, Florin STĂNICĂ, Roxana MADJAR
The paper presents the evolution of some soil agrochemical parameters: pH, mineral N, PAL, KAL and humus, between March 2015 and November 2016, in an organic edible rose culture under the influence of three ameliorative species and two mulching systems. With the goal of planting three edible rose varieties, in the experimental field of USAMV Bucharest, a special soil preparation was applied in the spring of 2015. Three ameliorative plants, Sinapis alba L., Tagetes patula L. and Phacelia tanacetifolia L., with role in soil disinfection were used in seven different combinations (V1-V7) and a control plot was kept without seeding (V8). After flowering and seed formation, the mature plants were trimmed and incorporated into the soil. After the organic roses planting, the same variants were seeded between the rose rows in the spring of 2016. In the summer of 2016, two mulching variants were applied for each initial variant (Vn), on the roses rows: Vn.1. wood chips and Vn.2. wool, while the control Vn.3., was represented by unmulched soil. The results show important changes on soil characteristics due to the influence of ameliorative species and mulch systems. All the wool variants (Vn.2.) have an important increase of N mineral, from an initial average of 3.375 ppm to 51.375 ppm at V1.2. Sinapis compared to 23.125 at V8.2.Control. The P content increased from 192 ppm to 398 ppm in V4.3. - Sinapis + Tagetes variant. The K content increased from 274.56 ppm in the initial stage to a maximum of 800 ppm in the V1.2. - Sinapis variant on wool mulched row. The humus content modified from 2.37% to 3.12% in more variants (V1.2., V2.3., V2.2., V6.1.). V1.2. Sinapis with wool mulch variant presents the best improvement of agrochemical parameters (pH 7.09; mineral N 51.375 ppm; K 800 ppm and humus 3.12%) compared with the others variants.
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