Responses of different purple nutsedge (Cyperus rotundus L.) ecotypes to early and late flooding [manuscript]
Date
2019
Authors
Jayvee S. Bruno
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Abstract
The study aimed to determine the responses of different purple nutsedge (Cyperus rotundus L.) ecotypes to early and late flooding. The experiment was laid out two-way factorial in Randomized Complete Block Design (RCBD). In this study, two factors were involved such as Factor A (Flooding) and Factor B (Ecotypes). Two experiments were conducted simultaneously such as early and late flooding. Different ecotypes of Cyperus rotundus L. were collected in upland and lowland rice field.
Cotrol were flooded throughout and maintained saturated, represented by A1 and A5, respectively. Early and late flooding within 7, 14 and 21 DAP were labeled as A2, A3, and A4, respectively. Height and number of shoots were measured regularly within 50 days of experiment.
Results revealed that keeping the pre-germinated tubers to flooding within 50 DAP severely reduced the height and production of shoots in both upland and lowland ecotype. On the contrary, maintaining it under saturated condition allowed the growth of shoots. Furthermore, early flooding minimized the growth of these ecotypes. However, late flooding allowed early growth and establishment of Cyperus rotundus L. and therefore produced more shoots and tubers.