Effects of aqueous leachates of multipurpose trees on test crops

Abstract

The allelopathic potential of the agroforestry trees Ficus subincisa Buch.-Ham. ex J. E. Smith, Bauhinia purpurea L., and Toona hexandra Wallich ex Roxb. was investigated on Triticum aestivum L., Brassica campestris L., and Hordeum vulgare L. test crops. The leaf and bark leachates of trees were both toxic to the germination of the test crops. The inhibition of the germination of test crops was significant. The effects of leachates on test crops were concentration dependent. So, higher concentrations of leaf and bark leachates showed stimulatory effects on the radicle and plumule growth of all test crops. The acceptance of these multipurpose tree species as agroforestry trees in association with field crops decreased in the order Ficus subincisa, Bauhinia purpurea, and Toona hexandra.

Allelopathic effect of Melia azedarach L. and Populus nigra L. on germination and growth Brassica campestris L.

“…Similarly, the phytotoxic effects of Ziziphus nummularia (Rhamnaceae) leaf, bark, and fruit on Vigna radiata and Brassica campestris seeds were consistent with our findings, where plumule and radical growth were significantly retarded by an aqueous extract of bark at all concentrations and soaking times. Singh et al (2009) found phytotoxicity of Parthenium hysteronnphorus residues on the growth parameters of three tested Brassica species (B. campestris, B. oleracea and B. rapa). In a trial to explore the inhibitory mechanism (Phuwiwat et al, 2012;Hussain and Abbas, 2021) these researches revealed allelopathic effect caused by the release of water-soluble phenolic into the soil.…”

“…Furthermore, the concentrations of these allelochemicals in the generating plant and the plant tissue produced may change over time. For example, foliar and leaf litter leachates of Eucalyptus species, are more toxic than bark leachates to some food crops (Singh and Kumar, 2009). A large number of plants impose inhibitory effects on the germination and growth of neighboring or successional of plants by releasing allelopathic chemicals into the soil, either as exudates from living tissues or by decomposition of plant residues (Khan et al, 2009).…”

Allelopathic Effects of Schima khasiana and Michelia champaca on Germination and Growth of Some Legume and Cereal Crops of North Eastern Himalayan Region

“…Kumar et al [20] recorded to reduce germination, radical and plumule extension of soybean by Melia azadirechta, Morus alba and Moringa oleofera. Singh et al [21,14] reported that the higher concentration significantly stimulate the radicle and plumule growth of text crops.…”

“…The leaf extracts of Terminalia bellirica, Terminalia chebula, Aegle marmelos and Sapindus mukorossi were inhibitory effects at higher concentrations but at low concentrations have stimulatory effects reported [15]. Earlier studies, [16] reported that test crops grown in soil, mulched with dry fresh leaves of Adina cordifolia, Prunus cerasoides, Alnus nepalensis, and Celtis australis significantly inhibited the germination growth and yield of Eleusine coracana, Hordeum vulgare and Glycine max [17]. Also reported that the higher concentration significantly inhibit the germination and growth of test crops.…”

Investigation of Allelopathic Potential of Acacia Nilotica L.

“…The multiple effects resulting from allelochemicals include a decrease in plant development, absorption of water, mineral nutrients, ion uptake, leaf water potential, shoot turgor pressure, osmotic potential, dry matter production, leaf area expansion, stomatal aperture size, stomata diffusive conductance, and photosynthesis (5). Most research on allopathy has focused on the essence of interaction between weed species, weed crops and crop species (41). Understanding allelopathic effects of forest trees on potential crops is vital for successful agroforestry systems (21).…”