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Relationships between plant density, row spacing, depth of root penetration and water-use efficiency and the reproductive yield of dryland cotton
Year:
1969
Authors :
Gutstein, Yitshak
;
.
Volume :
17
Co-Authors:
Gutstein, Y.
Facilitators :
From page:
347
To page:
366
(
Total pages:
20
)
Abstract:
The influence of plant population and spacings on (a) extent and depth of root penetration and the rate of evapotranspiration of winter-stored water, (b) efficiency of water-use for reproductive yield, (c) earliness of maturity, and (d) decreased yield due to insect pest damage was investigated in cotton cultivars of two species, Gossypium hirsutum L. and G. barbadense L., during three growing seasons. The highest plant densities favored, mainly in G. hirsutum L. (Acala 1517 C), root penetration and increased water uptake up to 60 m3/1000 m2. The maximum yield per unit area and water-use efficiency for production of seed-cotton was obtained with intermediate to dense plant populations. The intracultivar variations in water-use efficiency induced by plant spacings and densities ranged from 0.451 to 1.099 kg/m3 in Acala 1517 C and from 0.497 to 0.938 kg/m3 in Pima 32. Estimates of partial correlation indicated a closer dependence of yield of seed-cotton on the number of bolls per plant than on the boll weight. The degree and significance of the correlation with boll weight varied with plant density. It was also determined that the yield of seed-cotton per plant is greatly affected by the assigned soil area and volume distribution around it. The estimated yield regression curves indicated that yield of seed-cotton does not depend merely upon the plant density but is to a large extent affected by the type of spacing. In two-direction spacing variations, plant densities up to 150,000 plants/ha exhibited a symmetric parabolic relationship with yield of seeds and of lint. In Acala 1517 C, the maximum yield of lint (690 kg/ha) was estimated as obtainable at 107,790 plants/ha. Plant density interacted with cultivars in its effect on lint percentage. It considerably affected earliness (up to 30%) and the loss in yield due to damage inflicted by Earias insulanaBoisd. The cultivars also responded differentially to the number of plants per hill. G. hirsutum cultivars, and in particular Acala 1517 C, exhibited a more favorable production ability under subtropical dryland conditions than did G. barbadense cultivars. © 1969 Dr. W. Junk N.V. - Publishers.
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DOI :
10.1007/BF01100199
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29549
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:47
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Scientific Publication
Relationships between plant density, row spacing, depth of root penetration and water-use efficiency and the reproductive yield of dryland cotton
17
Gutstein, Y.
Relationships between plant density, row spacing, depth of root penetration and water-use efficiency and the reproductive yield of dryland cotton
The influence of plant population and spacings on (a) extent and depth of root penetration and the rate of evapotranspiration of winter-stored water, (b) efficiency of water-use for reproductive yield, (c) earliness of maturity, and (d) decreased yield due to insect pest damage was investigated in cotton cultivars of two species, Gossypium hirsutum L. and G. barbadense L., during three growing seasons. The highest plant densities favored, mainly in G. hirsutum L. (Acala 1517 C), root penetration and increased water uptake up to 60 m3/1000 m2. The maximum yield per unit area and water-use efficiency for production of seed-cotton was obtained with intermediate to dense plant populations. The intracultivar variations in water-use efficiency induced by plant spacings and densities ranged from 0.451 to 1.099 kg/m3 in Acala 1517 C and from 0.497 to 0.938 kg/m3 in Pima 32. Estimates of partial correlation indicated a closer dependence of yield of seed-cotton on the number of bolls per plant than on the boll weight. The degree and significance of the correlation with boll weight varied with plant density. It was also determined that the yield of seed-cotton per plant is greatly affected by the assigned soil area and volume distribution around it. The estimated yield regression curves indicated that yield of seed-cotton does not depend merely upon the plant density but is to a large extent affected by the type of spacing. In two-direction spacing variations, plant densities up to 150,000 plants/ha exhibited a symmetric parabolic relationship with yield of seeds and of lint. In Acala 1517 C, the maximum yield of lint (690 kg/ha) was estimated as obtainable at 107,790 plants/ha. Plant density interacted with cultivars in its effect on lint percentage. It considerably affected earliness (up to 30%) and the loss in yield due to damage inflicted by Earias insulanaBoisd. The cultivars also responded differentially to the number of plants per hill. G. hirsutum cultivars, and in particular Acala 1517 C, exhibited a more favorable production ability under subtropical dryland conditions than did G. barbadense cultivars. © 1969 Dr. W. Junk N.V. - Publishers.
Scientific Publication
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