Effects of planting density on growth, light interception and yield of a photoperiod insensitive pigeon pea (Cajanus cajan)

Rowden R., Gardiner D., Whiteman P.C. and Wallis E.S. (1981) Effects of planting density on growth, light interception and yield of a photoperiod insensitive pigeon pea (Cajanus cajan). Field Crops Research, 4 C: 201-213. doi:10.1016/0378-4290(81)90072-1


Author Rowden R.
Gardiner D.
Whiteman P.C.
Wallis E.S.
Title Effects of planting density on growth, light interception and yield of a photoperiod insensitive pigeon pea (Cajanus cajan)
Journal name Field Crops Research   Check publisher's open access policy
ISSN 0378-4290
Publication date 1981-01-01
Sub-type Article (original research)
DOI 10.1016/0378-4290(81)90072-1
Volume 4
Issue C
Start page 201
End page 213
Total pages 13
Subject 1102 Cardiovascular Medicine and Haematology
1110 Nursing
Abstract A newly selected short-statured, early flowering, photoperiod insensitive line of pigeon pea was planted in February 1979 at four densities, viz. 2 × 105, 3 × 105, 5 × 105 and 1 × 106 plants ha-1. Maximum values of relative growth rate (RGR) (0.17 g g-1 day-1), net assimilation rate (NAR) (85 g m-2 week-1) and leaf area ratio (LAR) (1.6 dm2 g-1) were achieved by 25 days from planting at the lower densities. Maximum NAR and RGR at 1 × 106 density was delayed until day 36. By day 45 this density had almost complete light interception, and all densities had complete interception by day 85. This variety had a low extinction coefficient (0.3) suggesting that canopy structure was efficient in allowing light penetration. Since crop growth rate and leaf area index (LAI) were linearly related, highest dry matter yields were at the highest density. Highest seed yield per hectare (1300 kg) was at the 5 × 105 density, but overall, yields were not significantly different. Pod number per plant was the main determinant of yield. From the relationship of pod number per plant and density, an optimum density of 7.5 × 105 plants ha-1 was predicted. It was concluded on the basis of growth and leaf area data that this new material could support a higher photosynthetic demand if the objectives of a breeding program to increase seed size and/or seeds per pod could be achieved.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 13 Sep 2016, 14:34:14 EST by System User