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Response of Black Nightshade ( Solanum nigrum L.) to Phosphorus Application

Response of Black Nightshade ( Solanum nigrum L.) to Phosphorus Application A pot experiment was conducted to study the effect of phosphorus (P) on the vegetative and reproductive growth of black nightshade (Solanum nigrum L.). Single superphosphate was applied at 0, 0.15, 0.30, 0.45, 0.60 and 0.75 g P/pot containing 3.5 kg of soil. Seeds were sown directly in pots and plant samples were taken at fortnightly intervals for recording growth and yield parameters. In addition, the solasodine content in fruit and N, P and K levels in leaves were also estimated. Most parameters were significantly influenced by P, with0.45 g/pot generally proving optimal. The data also established that the berries should be harvested between 160 and 190 days (days after sowing), preferably at 175 days for maximum fruit yield and solasodine production. Most parameters showed consistent and positive correlations with leaf P content. Interestingly, the correlation between leaf P content at 40 days and solasodine yield at 175 days was highly significant (r = 0.888), implying that the former is predictive of the latter. Thus, if low leaf P content was noted at 40 days corrective measures like foliar application or top dressing may be adopted to increase the leaf P content to ensure maximum solasodine at harvest. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

Response of Black Nightshade ( Solanum nigrum L.) to Phosphorus Application

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References (9)

Publisher
Wiley
Copyright
Copyright © 2000 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1046/j.1439-037x.2000.00334.x
Publisher site
See Article on Publisher Site

Abstract

A pot experiment was conducted to study the effect of phosphorus (P) on the vegetative and reproductive growth of black nightshade (Solanum nigrum L.). Single superphosphate was applied at 0, 0.15, 0.30, 0.45, 0.60 and 0.75 g P/pot containing 3.5 kg of soil. Seeds were sown directly in pots and plant samples were taken at fortnightly intervals for recording growth and yield parameters. In addition, the solasodine content in fruit and N, P and K levels in leaves were also estimated. Most parameters were significantly influenced by P, with0.45 g/pot generally proving optimal. The data also established that the berries should be harvested between 160 and 190 days (days after sowing), preferably at 175 days for maximum fruit yield and solasodine production. Most parameters showed consistent and positive correlations with leaf P content. Interestingly, the correlation between leaf P content at 40 days and solasodine yield at 175 days was highly significant (r = 0.888), implying that the former is predictive of the latter. Thus, if low leaf P content was noted at 40 days corrective measures like foliar application or top dressing may be adopted to increase the leaf P content to ensure maximum solasodine at harvest.

Journal

Journal of Agronomy and Crop Science – Wiley

Published: May 1, 2000

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