Halli lepa peenjuurte biomass ja produktsioon puistute vanusereas
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Kuupäev
2014
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Käesoleva töö peamiseks eesmärgiks oli uurida ja hinnata hall-lepikute (Alnus incana
(L.) Moench) maa-aluse osa peenjuurte (d<2mm) biomassi ja peenjuurte
produktsiooni viiel erineval katsealal, nelja erineva vanusega puistus (7 a, 17 a, 22 a,
32 a). Kõik uurimisalused hall-lepikud kasvavad naadi kasvukohatüübis.
Puistute maa-aluse osa hindamiseks kasutati kahte erinevat meetodit: peenjuurte
biomassi hindamiseks mullamonoliitide meetodit, peenjuurte produktsiooni
hindamiseks juurevõrgu meetodit.
Hall-lepikute peenjuurte biomass 22-aastasel Võõpste katsealal oli 2,3 t ha-1
.
Vanemates 32-aastastes Agali ja Kõlleste vana puistutes olid peenjuurte biomassid
vastavalt 1,7 t ha-1 ja 2,6 t ha-1
. Kõige nooremates hall-lepikutes Kõlleste noor ja
Ilmatsalu katsealadel jagunesid peenjuurte biomassid suhteliselt võrdselt vastavalt
Kõlleste noores 1,1 t ha-1 ja Ilmatsalus 1,2 t ha-1
.
Kõlleste noore peenjuurte produktsioon oli 1,5 t ha-1
a
-1
, Ilmatsalus 1,8 t ha-1
a
-1
ning
Võõpstes 1,4 t ha-1
a
-1
. Peenjuurte produktsioon Agali proovialal oli 0,8 t ha-1
a
-1
,
samavanuselises Kõlleste vana peenjuurte produktsioon oli 1,7 t ha-1
a
-1
.
Peenjuurte produktsioon puu kohta on Kõlleste noor katsealal 0,1 grammi. Ilmatsalu
katseala puistu peenjuurte produktsioon sarnaneb Võõpste katselalaga, kus mõlemad
puistud on tootnud ca 0,5 grammi puu kohta. Agali katsealal jääb peenjuurte
produktsioon 0,6 grammi puu kohta. Suurim peenjuurte produktsioon on Kõlleste
vana katsealal (0,7 g).
The present study was carried out in five different grey alder (Alnus incana (L.) Moench) stands in very productive Aegopodium site type in South-Estonia. The fine root (d<2mm) biomass and production of a 7-, 17-, 22 and 32-year-old grey alder stands were estimated. The fine root biomass and production were estimated with two methods: soil coring method was used to estimate biomass of the fine roots and ingorwth core method for estimating production of the fine roots. Fine root biomass in 22-year-old Võõpste stand were estimated 2.3 t ha-1 . In older stands, 32-year-old Agali and Kõlleste vana the fine root biomass is 1.7 t ha-1 and 2.6 t ha-1 . The fine root biomass is 1.1 t ha-1 and 1.2 t ha-1 , respectively in 7-year-old Kõlleste noor and 17-year-old Ilmatsalu grey alder stand. Fine root production in studied grey alder stands is in the range of 0.8-1.8 t ha-1 y -1 , being the highest in Ilmatsalu and the lowest in Agali stand. Fine root production per tree in Kõlleste noor is 0.1 g. In Ilmatsalu stand fine root production is similar to Võõpste stand, both stands produce ca 0.5 g per tree per year. Fine root production in Agali stand is 0.6 g per tree per year. In Kõlleste vana stand fine root production per tree is the highest (0.7 g).
The present study was carried out in five different grey alder (Alnus incana (L.) Moench) stands in very productive Aegopodium site type in South-Estonia. The fine root (d<2mm) biomass and production of a 7-, 17-, 22 and 32-year-old grey alder stands were estimated. The fine root biomass and production were estimated with two methods: soil coring method was used to estimate biomass of the fine roots and ingorwth core method for estimating production of the fine roots. Fine root biomass in 22-year-old Võõpste stand were estimated 2.3 t ha-1 . In older stands, 32-year-old Agali and Kõlleste vana the fine root biomass is 1.7 t ha-1 and 2.6 t ha-1 . The fine root biomass is 1.1 t ha-1 and 1.2 t ha-1 , respectively in 7-year-old Kõlleste noor and 17-year-old Ilmatsalu grey alder stand. Fine root production in studied grey alder stands is in the range of 0.8-1.8 t ha-1 y -1 , being the highest in Ilmatsalu and the lowest in Agali stand. Fine root production per tree in Kõlleste noor is 0.1 g. In Ilmatsalu stand fine root production is similar to Võõpste stand, both stands produce ca 0.5 g per tree per year. Fine root production in Agali stand is 0.6 g per tree per year. In Kõlleste vana stand fine root production per tree is the highest (0.7 g).
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