Research on the effect of wheat yield fertilization in the long term experience at ARDS Secuieni

The rational application of fertilizers ensure along with other means of increasing production, the raising of soil fertility and thr practice of a large productivity agriculture and economic efficiency. The fertilizer dose schedule is a tehnological activity, base don the agrochemical data from the field and from plamnned harvest. This paper presents experimental results for 2006-2009 period obtained in a long experience on the influence of phosphorum and nitrogen fertilizer on winter wheat production at ARDS Secuieni. The experience had in study: A – P2O5 dose: 0, 40, 80, 120, 160 kg/ha; B – N dose: 0, 40, 80, 120, 160 kg/ha. The cultivated variety: Crina. The productions were influenced by the dosage of fertilizer applied but also by the climatic conditions during the research. The productions in the unfertilized variant were 3269-6590 kg wheat/ha (period average was 4910 kg wheat/ha). By applying the P2O5 and N fertilizers the production increases were 5-33% representing 228-1617 kg wheat/ha. By applying phosphorus fertilizers the productions increases were 358-614 kg wheat/ha representing 6-11% and by applying nitrogen fertilizers increases ranging from 543-1150 kg wheat/ha representing 10-22%. The marginal increases in pjosphorus fertilizer application were 3,83-8,95 kg wheat/kg P2O5 and 7,18-13,57 kg wheat/kg N in nitrogen fertilizer application, in both cases were inversely proportional with the doses of fertilizers applied

Data on the knowledge of injurious organisms in hemp crops from the Central Moldavia

The observations and determinations carried out in monoecious hemp crops from Central Moldavia, during 2005-2007, have shown that the injurious entomofauna was made up of 20 species of insects, which summed up each year, on the average, 3164.14 individuals/m2. The injurious entomofauna was framed within the orders Coleoptera, Homoptera, Heteroptera, Diptera and Lepidoptera. The order percent was of 35% for Coleoptera, 30% for Lepidoptera, 15% for Diptera and 10% for Homoptera and Heteroptera. Analysing the dominance of collected species, according to their spreading, 16 species belonged to class D1- subrecedent species, two species to class D2- recedent species, one species to class D3 – subdominant species and two species to class D5 – eudominant species. According to the number of registered species, the rate of dominance classes was of 75% for class D1, 10% for classes D2 and D5, 5% for class D3, and no dominant species was registered in class D4. The hemp crops were also affected by seven pathogenic agents: Pythium de Baryanum, Fusarium oxysporum, Xanthomonas campestris var. cannabis, Septoria cannabis, Perenoplasmopara cannabina, Sclerotinia sclerotiorum and Botrytis infestans. The mean frequency of the attack produced by these pathogenic agents had values between 0.63% (Botrytis infestans) and 16.96% (Septoria cannabis)

Seed production of biological categories at top of soybean cultivars and their behavior to soil and climatic conditions at ARDS Secuieni

Seed production is a very important activity for agricultural production, the quality of biological material depends largely cultivated production level obtained. A good organization of seed production must not only satisfy the production of seeds with higher seminal qualities, but to ensure a seed productivity, what can’t be achieved without knowing the nature of plants and their requirements to the conditions of existence. Plant with high fat and protein content soybean is grown on large areas worldwide, the total amount of biomass being used, especially seeds with high protein substances ( 27.0 - 50.0%) and fats (17.2 - 26 , 9%). Mature seeds can be used in human nutrition (in various recipes), to obtain compound and for fat extraction. As a leguminous plant, which enters into symbiotic relationship with nitrogen fixing bacteria, soy is a valuable pre-plant crop rotation. Given the multiple uses of biomass soybean, it is considered „gold plant’’ of people, „extraordinary plant’’or ,,plant of the future’’. During 2008 - 2010, in the Seed Production Laboratory of Agricultural Research and Development Station Secuieni, Neamt, had been grown three soybean varieties, Granat, Onix and Eugen, created by ARDS Turda. These varieties have performed very well in ARDS Secuieni soil and climate conditions realizing production up to 3000 kg / ha. Due to the results obtained in 2011, ARDS Secuieni became the maintainer of variety of soybean varieties Onix and Eugen, establishing maintenance field and future expansion plans for seed production area for superior biological categories

Study of nitrogen fertilization at maize crop in A.R.D.S. Secuieni conditions

In the structure of chemical fertilizers, the nitrogenous ones occupy the main place by their contribution in the determination of crop increase, favorably influencing the accumulation of protein substances in maize. The paper presents the results obtained at A.R.D.S. Secuieni in a long-lasting experience with chemical fertilizers at maize crops. The researchers investigated the influence of nitrogen fertilizers on corn crops at A.R.D.S. Secuieni during 2014 – 2016 and had two directions of approach: - the study of the technical efficiency regarding the contribution of nitrogen fertilizers on the obtained yields, the production increase and the marginal increase, in order to optimize the soil - plant system (maximizing the yield and rationalization of the fertilizer); - the study of the economic efficiency of nitrogen fertilizers application (values of production increase, costs, income, profit, profit rate, unit costs) by differential application of fertilizer inputs

RESEARCHES REGARDING THE INFLUENCE OF THE NUTRITION SPACE AT DRACOCEPHALUM MOLDAVICA L. (DRAGONHEAD) SPECIES CULTIVATED UNDER THE CONDITIONS OF A.R.D.S. SECUIENI

The present paper presents the results on the influence of the nutrition space at Dracocephalum moldavica L., cultivated under the conditions of A.R.D.S. Secuieni between 2016 and 2017. Following the interaction of the factors, the distance between the rows and the distance between the plants per row was found that in the variant sown at 70 cm between the rows and 15 cm between the plants per row there was an increase in the average number of branches (2,27). The variants sown at 50 cm and 70 cm between the rows achieved deficit production, very significant compared to the control sowing at the 25 cm between the rows

RESEARCHES REGARDING THE INFLUENCE OF THE NUTRITION SPACE AT DRACOCEPHALUM MOLDAVICA L. (DRAGONHEAD) SPECIES CULTIVATED UNDER THE CONDITIONS OF A.R.D.S. SECUIENI

The present paper presents the results on the influence of the nutrition space at Dracocephalum moldavica L., cultivated under the conditions of A.R.D.S. Secuieni between 2016 and 2017. Following the interaction of the factors, the distance between the rows and the distance between the plants per row was found that in the variant sown at 70 cm between the rows and 15 cm between the plants per row there was an increase in the average number of branches (2,27). The variants sown at 50 cm and 70 cm between the rows achieved deficit production, very significant compared to the control sowing at the 25 cm between the rows

Research on the influence of fertilization on the structure of vegetation cover in temporary meadows with mixed use under the center of Moldova condition

At the A.R.D.S. Secuieni it was researched the evolution of different mixtures of perennial grasses and legumes with mixed use, evidenced by their contribution to the structure of the vegetation, considering the percentage of participation of the species in the seed norm and mode of use. The results obtained on the evolution of the structure of vegetation cover at the mixtures with mixed use, was observed that was obtained five harvests, the first harvest being done in hayfield regime, and the next four were harvested by grazing simulation, at an interval of 28 days. At the mixture b2, composed of Dactylis glomerata 20% + Lolium perenne 70% + Lotus corniculatus 5% + Trifolium pratense 5%, in 2014, in the hayfield regime, in structure of vegetation cover the dominant percentage was in favor of the perennial grasses, comprised between 57% in the fertilized variant with N40P40 and 67% at the N80P40 variant. On the other four harvests, the perennial grasses tended to slightly decrease from one harvest to another except for the fertilized variant with N80+40P40, where the participation of the grasses had a tendency to increase between 46-61%. In 2015, the percentage of participation of the perennial grasses in the structure of the vegetal cover was maintained throughout the five harvests. The highest percentages of legumes were in fertilized variants with N40P40 and N80P40, the values being between 12-15%

Research regarding the influence of genotype and epoch of sowing on seeds yield at Ricinus communis L. (castor) in the pedoclimatic conditions from the Central of Moldova

The researches were organized in 2018-2019 at the Moldoveni Agricultural Society, Neamt County. In the agricultural year 2018, the genotypes experienced did not show a high adaptability to the pedoclimatic conditions of the area, obtaining yields below 1500 kg/ha. Compared to 2018, the yields obtained in 2019 were higher, this was due to the excess of precipitation registered in May of approximately 30 mm. The yields varied between 1297 kg/ha (Teleorman variety) and 1548 kg/ha (Cristian variety). During in the period under study, the highest yield increases (38 kg/ha, respectively 127 kg/ha), compared to the control (average experience) were obtained for the variants sown in the first and second epochs, which results that the castor being favorable for sowing until the second half of April