Journalartikel

Jahr der Veröffentlichung: 2011

Seiten: 317-325

Zeitschrift: Journal of Sustainable and Organic Agricultural Systems

Bandnummer: 61

Heftnummer: 4

ISSN: 0458-6859

eISSN: 2700-8711

URL: https://nbn-resolving.org/urn:nbn:de:gbv:253-201112-dn049565-4

Verlag: Johann Heinrich von Thünen-Institut

Abstract: 

An eight week pot experiment was conducted under semi controlled conditions to investigate the interactive effects of organic P nutrition and drought stress on P utilisation of four different crop species.
Two P treatments were established: organic P supply with phytin (0.40 g P per pot) and a control without any additional P supply. The two water treatments were irrigated according to 60 A) (well watered) and 30 % (drought stress) water holding capacity of the soil.
The P uptake, shoot biomass and proline content of sorghum (Sorghum bicolor x Sorghum sudanense), amaranth (Amaranthus cruentus), oilseed rape (Brassica napus) and rye (Secale cereale) were studied. Furthermore, in the soil we measured the pH value, soil P pools (soluble in water, double-lactate and oxalate) as well as the P sorption capacity, degree of P saturation and the activities of acid and alkaline phosphatases.
Drought stress reduced the P uptake of sorghum and rye, while P uptake of amaranth and oilseed rape was not affected by water supply. The application of organic P increased the plant P uptake and biomass production in both water treatments about 30 % but did not mitigate the effects of water stress. Drought resulted in higher proline contents in plant tissue; significantly elevated values were measured in oilseed rape and rye. The activity of acid phosphatase in soil was increased in the treatments with drought stress as well as after organic P supply. Soil P pools were affected by the balance of P supply and plant P uptake, but obviously not by the water treatments.
The results suggest crop specific reactions on water shortage and P deficiency, which should be taken into consideration for P fertilization recommendations.

Harvard-Zitierstil: Brandt, C., Balko, C. and Eichler-Löbermann, B. (2011) Interactive effects of soil water content and phytin supply on phosphorus nutrition of different crops species, Landbauforschung = Journal of Sustainable and Organic Agricultural Systems, 61(4), pp. 317-325. https://nbn-resolving.org/urn:nbn:de:gbv:253-201112-dn049565-4

APA-Zitierstil: Brandt, C., Balko, C., & Eichler-Löbermann, B. (2011). Interactive effects of soil water content and phytin supply on phosphorus nutrition of different crops species. Landbauforschung = Journal of Sustainable and Organic Agricultural Systems. 61(4), 317-325. https://nbn-resolving.org/urn:nbn:de:gbv:253-201112-dn049565-4