Responses of reed canary grass to high and low water content in acid sulphate soils

Kenedy Etone Epie, Seija Virtanen, Asko Simojoki, Fred Stoddard

Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussaKonferenssiartikkeliAmmatillinen

Abstrakti

To examine the suitability of acid sulphate soils for perennial energy cropping and specifically to provide information on the responses of reed canary grass (Phalaris arundinacea L.) to raised water levels, a management option for these problematic soils, large core lysimeters of undisturbed field acid sulphate soil were taken into PVC tubes equipped with ground water level control and measurement instruments, planted with reed canary grass, and studied during the period 2008 - 2010. Two treatments; high water content (HWC) (20 cm below soil surface) and low water content (LWC; 70 cm below soil surface, considered normal for acid sulphate soils) were considered and there were 4 replicates. Tiller height, net photosynthesis, and dry weight at harvest were measured and elements were analysed after nitric acid digestion by an ICP-OES instrument. Tillers in HWC lysimeters were 30 and 22.5% taller than those in LWC lysimeters (P=0.001, P=0.003) in September 2009 and 2010 respectively. On the other hand, net photosynthesis was higher in LWC grasses (P=0.019, P=0.001). Spring 2009 dry matter yields were almost the same in both treatments, but in 2010, HWC grasses yielded 43% higher than LWC (P=0.002). The 2009 spring harvest analyzed so far for element composition revealed a higher proportion of Al, Fe and K in leaves and panicles than in stems, and differences between the treatments were not significant.
We concluded that reed canary grass, an established bioenergy crop, grows well in acid sulphate soils and can perform better when the water table is raised to reduce acidity and prevent environmental hazards. Furthermore, in order to obtain good quality biomass, harvesting should be done in spring after some of the deleterious elements affecting the processing stage such as K have been reduced by leaf drop and leaching.
Alkuperäiskielienglanti
Otsikko24th NJF Congress on Food, Feed, Fuel and Fun
Vuosikerta7
Julkaisupäivä2011
Sivut158
TilaJulkaistu - 2011
OKM-julkaisutyyppiD3 Artikkeli ammatillisessa konferenssijulkaisussa
TapahtumaNordic Association of Agricultural Scientist (NJF) Congress - Uppsala, Ruotsi
Kesto: 14 kesäkuuta 201116 kesäkuuta 2011
Konferenssinumero: 24th

Lisätietoja


Volume:
Proceeding volume: 7

Tieteenalat

  • 4111 Maataloustiede
  • 416 Elintarviketieteet

Projektit

  • 1 Päättynyt

Sustainable bioenergy cropping systems

Stoddard, F., Kenedy Etone, E., Santanen, A., Yli-Halla, M. & Simojoki, A.

01/01/201031/12/2013

Projekti: Tutkimusprojekti

Siteeraa tätä

Epie, K. E., Virtanen, S., Simojoki, A., & Stoddard, F. (2011). Responses of reed canary grass to high and low water content in acid sulphate soils. teoksessa 24th NJF Congress on Food, Feed, Fuel and Fun (Vuosikerta 7, Sivut 158)