Soil Amendment with Graded Levels of Craseonycteris thonglongyai compost on the Concentrations of some Phytotoxins in the Leaf of Cnidoscolus aconitifolius (Tree  Spinach): doi.org/10.26538/tjnpr/v6i2.15

Amanabo Musa; Mary L. Abu; Abdulwasiu B. Lawal; Abduljelili Uthman

Authors

Amanabo Musa Department of Biochemistry, Faculty of Natural Sciences, Ibrahim Badamasi Babangida University. M. B. 11,Lapai, Niger State, Nigeria
Mary L. Abu Department of Biochemistry, Faculty of Natural Sciences, Ibrahim Badamasi Babangida University. M. B. 11,Lapai, Niger State, Nigeria
Abdulwasiu B. Lawal Department of Biochemistry, Faculty of Natural Sciences, Ibrahim Badamasi Babangida University. M. B. 11,Lapai, Niger State, Nigeria
Abduljelili Uthman Department of Biochemistry, Faculty of Natural Sciences, Ibrahim Badamasi Babangida University. M. B. 11,Lapai, Niger State, Nigeria

Abstract

Generally, the nutrients and phytotoxins content in plants are influenced by physicochemical

properties of the soil among other environmental factors. It is for this reason that pot experiment

was conducted to investigate the influence of different levels of Craseonycteris thonglongyai

compost on the concentrations of cyanide, nitrate, saponin, tannin, phytate and oxalate in the

leaves of Cnidoscolus aconitifolius. The different levels of C. thonglongyai compost used were

control (0 g), 25, 50, 75, 100 and 125 g per 20 kg soil. The leaves of C. aconitifolius were

harvested at vegetative phase and subjected to standard analytical methods. The concentrations

of oxalate and phytate were evaluated using titrimetric method while concentrations of nitrate,

saponin and tannin were determined using spectrophotometric method. The results showed that

application of C. thonglongyai dung significantly (p < 0.05) decreased the concentrations of the

phytotoxins. Cyanide and phytate contents in the vegetable decreased with the application of

various levels of the compost. Whereas moderate application of the compost had no significant

effect on the concentrations of nitrate, saponin, tannin and oxalate, the concentrations of these

phytotoxins increased significantly with increase in the application of the C. thonglongyai

compost, particularly from 75 to 125 g per 20 kg soil. The study concludes that moderate

application of C. thonglongyai dung particularly that of 50 g per 20 kg soil improves the

nutritional quality of C. aconitifolius, as this quantity of the dung does not increase the

concentrations of the plant toxins evaluated in the vegetable except the nitrate content.

Keywords: Soil Amendment, Cnidoscolus aconitifolius, Phytotoxins, Craseonycteris

thonglongyai compost.

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