Plant growth and yield of kale (Brassica oleracea Acephala group) cultivars under plastic film mulch.

摘要: The objective was to determine the effects of plastic film mulch on growth and yield kale U.S. commercial cultivars accessions from Croatia. study conducted in Tifton, GA during winter, spring, summer 2011. Six-week-old seedlings were planted field raised beds (1.8-m centers) covered with mulch. design a randomized complete block split plot arrangement three replications, (black silver-over-black) being whole-plots (17 Croatian 8 cultivars) split-plots. Plant growth, chlorophyll index (SPAD), volumetric soil water content (SWC), root zone temperature at 10 cm deep (RZT) canopy monitored over growing season. Ranges attributes among were: leaf weight (10–110 g), plant height (35–55 cm), number marketable leaves (5–130 per plant), (0.4–1.5 kg/plant). There higher incidence downy mildew insect damage than cultivars. In general, accessions. height, stem diameter, SWC higher, while RZT lower silver black mulch, suggesting that affected by increased temperature. Leaf yield, however, unaffected