Proceedings of the NZ Plant Protection Conference 52 (1999): 209-213
Variability in distribution of fathen seeds in the soil was investigated to develop sampling protocols. Vertical distribution of seeds was assessed at 0-2.5, 2.5-5.0, 5.0-10.0 and 10.0-15.0 cm depth. Horizontal distribution of seeds in the top 5cm of soil was assessed in a 20 by 2.5 m grid at 50 cm intervals. Seeds were extracted from the samples by sieving and their viability was assessed. The fathen seed numbers halved with each 5 cm increase in depth. Seed numbers declined along the row in some cases but there was little localised clumping (± 1 m) of the seed. The most efficient method of sampling the fathen seedbank in a large field would be to take samples on a rectangular grid pattern to a depth of 10 cm.
Keywords: weed seed, Chenopodium album, fathen, seedbank, spatial diversity.
Copyright © 1999 New Zealand Plant Protection Society (Inc.).