Studies on the population density and root development in Lupinus mutabilis in relation to yield and yield components
Studies on the population density and root development in Lupinus mutabilis in relation to yield and yield components
Lupins are considered to be crops of great economic potential because of their high protein content and their adaptation to poor soils in diverse agroclimates. Lupin products could meet the 80% deficit in the EC's production of protein grain for livestock feed. This study examined the response of spring-sown crops of L.mutabilis cultivars to plant density, sowing date and P applications to assess the suitability of this species for cultivation under U.K. conditions. Detailed studies were also made of the timing of pod, seed and root development.
Experiments using population densities of 33, 50, 66 and 100 plants/m2; sowing dates of 5 April, 20 April and 5 May; and P applications of 25, 50 and 75 kg/ha were carried out at sites in Hampshire and Essex. Cultivar LM2 proved to be the most productive, giving highest seed yields at a population density of 100 plants/m2, under irrigated conditions, when sown in the mid season (20 April), and with 75 kg/ha of P2O5. Yields were higher in the irrigated crops in Hampshire than rainfed crops in Essex.
Detailed investigation of the components of yield showed that yield/plant, branches and pods/plant in all cultivars decreased with population density. Plants grown at high population densities had higher harvest indexes under both irrigated and rainfed conditions.
In greenhouse investigations on pod and seed development, different cultivars of L.mutabilis took from 25 to 40 days to attain maximum pod weight (in contrast L.albus which took 45 days). L.mutabilis cv. LM3 took only 50 days from anthesis to maturity (vs. 75-80 days in L.albus).
Root growth at various stages of development in L.mutabilis was compared with that in cultivars of L.albus and L.angustifolius. Because of their high rootmass at the anthesis stage, the genotypes of L.angustifolius may avoid nutrient and moisture stress in the early stages of development. Some genotypes of L.albus (No.5) and L.mutabilis (No.11) develop a higher rootmass during the seed-filling and mature stages of growth.
University of Southampton
1993
Chaudhary, Ghulam Ahmad
(1993)
Studies on the population density and root development in Lupinus mutabilis in relation to yield and yield components.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Lupins are considered to be crops of great economic potential because of their high protein content and their adaptation to poor soils in diverse agroclimates. Lupin products could meet the 80% deficit in the EC's production of protein grain for livestock feed. This study examined the response of spring-sown crops of L.mutabilis cultivars to plant density, sowing date and P applications to assess the suitability of this species for cultivation under U.K. conditions. Detailed studies were also made of the timing of pod, seed and root development.
Experiments using population densities of 33, 50, 66 and 100 plants/m2; sowing dates of 5 April, 20 April and 5 May; and P applications of 25, 50 and 75 kg/ha were carried out at sites in Hampshire and Essex. Cultivar LM2 proved to be the most productive, giving highest seed yields at a population density of 100 plants/m2, under irrigated conditions, when sown in the mid season (20 April), and with 75 kg/ha of P2O5. Yields were higher in the irrigated crops in Hampshire than rainfed crops in Essex.
Detailed investigation of the components of yield showed that yield/plant, branches and pods/plant in all cultivars decreased with population density. Plants grown at high population densities had higher harvest indexes under both irrigated and rainfed conditions.
In greenhouse investigations on pod and seed development, different cultivars of L.mutabilis took from 25 to 40 days to attain maximum pod weight (in contrast L.albus which took 45 days). L.mutabilis cv. LM3 took only 50 days from anthesis to maturity (vs. 75-80 days in L.albus).
Root growth at various stages of development in L.mutabilis was compared with that in cultivars of L.albus and L.angustifolius. Because of their high rootmass at the anthesis stage, the genotypes of L.angustifolius may avoid nutrient and moisture stress in the early stages of development. Some genotypes of L.albus (No.5) and L.mutabilis (No.11) develop a higher rootmass during the seed-filling and mature stages of growth.
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Published date: 1993
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Local EPrints ID: 462359
URI: http://eprints.soton.ac.uk/id/eprint/462359
PURE UUID: e7104c60-55bc-40ec-9a04-341c2c5a3dbc
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Date deposited: 04 Jul 2022 19:06
Last modified: 04 Jul 2022 19:06
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Author:
Ghulam Ahmad Chaudhary
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