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6. Biomass of alternative species for traditional cereal crops in Latvia and their potential impact on the carbon cycle.

Author

RANCĀNE, Sarmīte, LĪCĪTE, Ieva, ZUŠEVICA, Austra, ZUTE, Sanita, JANSONE, Inga, DAMŠKALNE, Margita, ZARIŅA, Līvija, KOROĻOVA, Jeļena, PUTNIECE, Gundega, and PRYSIAZHNIUK, Larysa

Subjects
*CARBON cycle, *CROPS, *POTATOES, *PLANT residues, *BIOMASS, *BUCKWHEAT, *CROP rotation, *TRITICALE
Abstract

Sustainable agroecosystems with systematic crop rotation and crop diversity can promote the maintenance of soil fertility and sustainable carbon cycling including CO2 sequestration from the atmosphere and formation of organic matter. To contribute to the implementation of the goals of the European Green Deal course, it is necessary to assess CO2 uptake capacity for the widest possible range of agricultural crops grown in a certain region. This study determined the amount of above-ground (ResidAG) and below-ground (ResidBG) residues of plants and the content of C and N fixed in them looking for relationships with the yield for six alternative crops for cereals grown in Latvia: winter rape (WRa), buckwheat (BW), peas (P), potatoes (PO), maize (M), and green fallow (GF) compared to cereals in two different regions of Latvia over a three-year period. Significant differences were found between alternative species in the amount of total (AG + BG) plant residues (g m-2 DM) left in the field: 1840 ± 67.8 for winter rape, 740 ± 30.7 for buckwheat, 767 ± 54.7 for peas, 323 ± 11.2 for potatoes, 172 ± 5.2 for maize, and 470.2 ± 30.9 for green fallow. The results showed that the winter crops - rape, triticale (WT), and rye (WR) - left the most total plant residues in the field with the most C content exceeding 80 g m-2 C in ResidBG and 600 g m-2 C in ResidAG. A significant variation in the amount of plant residues within the species depending on the year, cultivar, fertilisation, and soil properties was found, so for more accurate calculation of C and N inputs, the data set should be enlarged, or average statistical data be used. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Pašvaldību teritorijas attīstības plānošana:sadrbība meža teritoriju integrētai plānošanai

Author

Līcīte, Ieva, Kudreņickis, Ivars, and Latvijas Universitāte. Ekonomikas un vadības fakultāte

Subjects
Vides pārvaldība
Abstract

Maģistra darbā „Pašvaldību teritorijas attīstības plānošana: sadarbība meža teritoriju integrētai plānošanai” analizēti meža un pašvaldību teritorijas attīstības plānošanas procesi to savstarpējā mijiedarbībā un noteiktas plānošanas procesu paralēlās attīstības problēmas. Balstoties uz dokumentu analīzi un empīrisko pētījumu līdzšinējās Latvijas meža un pašvaldību teritorijas attīstības plānošanas integrācijas prakses novērtēšanai Talsu un Baldones novados izmantojot gadījumu analīzes metodi un intervējot mērķgrupu pārstāvjus, izstrādātas vadlīnijas integrētai meža un pašvaldību teritorijas attīstības plānošanai. Maģistra darbs izstrādāts 6 nodaļās un 16 apakšnodaļās uz 144 lpp. (neskaitot pielikumus). Darbā ietvertas 9 tabulas, 16 attēli un 11 pielikumi, minētas atsauces uz 109 dokumentiem un informācijas avotiem. Atslēgvārdi: meža plānošana pašvaldību teritorijas attīstības plānošanas procesā, vadlīnijas integrētai meža un pašvaldību teritorijas attīstības plānošanai, sadarbība un sabiedrības līdzdalība, gadījumu analīzes pētījumi., Master thesis „ Municipal spatial development planning: cooperation for integrated planning of forest territories” analyze spatial development planning processes of forest and municipal territories in their mutual interaction and detecting problems of parallel development of planning documents. On the basis of research of the former integration of forest and municipal spatial planning practices in Latvia - analysis of documents and empirical research – case studies of Talsi and Baldone counties including structured and semi structured interviews with representatives of target groups, guidelines for an integrated forest and local spatial planning are developed. The master thesis consists of 6 chapters and 16 subchapters on 144 pg., as well as 9 tables, 16 figures and 11 annexes. References are made on 109 documents and sources of information. Key words: forest planning in the process of spatial planning of municipalities, guidelines for integrated forest and municipal spatial development planning, cooperation and public participation, case study research.

Published
2012

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