Effects of Nitrogen on Reproductive Duration and Yield in Lentil Cultivars

Zakeri, Hossein; Bueckert, Rosalind; Schoenau, Jeff J.

doi:10.1080/01904167.2013.770019

Cited by 6 publications

(7 citation statements)

References 22 publications

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“…Application of N fertilizer at seeding increased pea grain N concentration (Lhuillier‐Soundélé et al, 1999) and N fertilization after flowering improved grain yield of soybean [ Glycine max (L.) Merr.] (Afza et al, 1987) and lentil (Zakeri et al, 2013). The pattern of legume N accumulation is different from non‐legumes in which grain N relies on N remobilization from vegetative parts.…”

Section: Discussionmentioning

confidence: 99%

“…3). Lowered plant N concentration at early growth stages can reduce plant yield potential; however, reduced plant N concentration may not necessarily affect total plant DM (Zakeri et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Sufficient moisture in areas similar to western Canada maximizes light interception and post‐flowering vegetative growth of this indeterminate crop, while prolonged BNF during pod‐filling supplies grain N (van Kessel, 1994; Hanlan et al, 2006). This growth pattern, which is common in the northern Great Plains, results in strong associations between lentil yield with total plant DM and N, HI, and reproductive duration of lentil (Whitehead et al, 2000; Zakeri et al, 2013). Deleterious effects of ineffective rhizobia (Bremer et al, 1989) and heat and drought stresses (Zakeri et al, 2012; Kurdali, 1996) limit post‐flowering C assimilation and BNF, and reduce grain yield.…”

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confidence: 97%

“…A moderate rate of N fertilizer (80 kg ha -1 ), as opposed to inoculation with rhizobia, hastened maturity of lentil and chickpea in Saskatchewan (Gan et al, 2005(Gan et al, , 2009). The early maturity is explained by inhibited BNF due to N fertilizer, which results in late-season plant N starvation and induces early maturity (Zakeri et al, 2013). We aimed to study the pattern of lentil DM and N accumulation and partitioning between vegetative and reproductive organs in response to the source of N. For this, lentil was grown under different N fertility treatments, and accumulated DM and N of the plant in leaf, stem, and pod was measured during two growing seasons.…”

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Post‐flowering Biomass and Nitrogen Accumulation of Lentil Substantially Contributes to Pod Production

Zakeri

Bueckert

2015

Crop Science

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Lentil (Len culinaris L.) is an indeterminate legume crop that continues to grow and accumulate biomass (DM) after flowering. Abundant N can stimulate post‐flowering vegetative growth of lentil and reduce partitioning of DM and N into pods. The effect of inoculant rhizobia, 50 kg N fertilizer ha–1 and non‐treated control treatments on DM and N partitioning of lentil was studied in Saskatchewan. Accumulated DM and N in leaf, stem and pod of eight lentil cultivars were measured at flowering, podding, and maturity. The results showed that more than 85% of DM (5.8 g DM plant–1) and N (143 mg N plant–1) were accumulated after lentil flowering. Of the 167 mg N and 6.5 g DM plant–1 at maturity, 58% DM and 75% N was in pod, 26% DM and 10% N was in stem, and leaf had the remaining 15% of the DM and N. The treatments affected N concentration and occasionally total DM and N content of the plant organs, but partitioning of DM and N among the three parts was independent of the treatments. In comparison, soil moisture significantly affected total and partitioning of DM and N into pod. Among the cultivars, the medium‐maturing cultivar CDC Milestone accumulated similar DM and N as late‐maturing ones, but allocated a greater portion of DM and N to pod than the late‐maturing cultivars. Overall, available N during pod‐filling promotes lentil biomass and pod production, but the efficiency of DM and N partitioning to pod is controlled by plant genotype and soil moisture.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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confidence: 97%

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Post‐flowering Biomass and Nitrogen Accumulation of Lentil Substantially Contributes to Pod Production

Zakeri

Bueckert

2015

Crop Science

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“…In cool‐season pulse crops, the balance of vegetative and reproductive growth during reproductive growth is associated with C‐based assimilate and crop growth rate (Guilioni, Wéry, & Lecoeur, 2003; Weber, Borisjuk, & Wobus, 1996), water, N, and temperature (Larmure, Salon, & Munier‐Jolain, 2005; Zakeri, Bueckert, & Schoenau, 2013). Warm temperature and drought cause a shorter life cycle, greater seed protein concentration, small seeds, and lower yield (Karjalainen & Kortet, 1987).…”

Section: Introductionmentioning

confidence: 99%

First versus last born: Flowers, pods, and yield formation in no‐tillage lentil

et al. 2020

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Lentil (Lens culinaris Medik.) is a grain legume crop grown under no-tillage (NT) management and rhizobia inoculation in the northern Great Plains. Our goal was to characterize pod growth characteristics to understand yield formation in North American short-season cultivars. Objectives were to compare pods on nodes during early and late reproductive growth through flower and pod number, pod setting percentage, pod growth rate, effective pod-filling period, and final pod size, and to test if N fertility could increase pod numbers and pod growth under NT management. Two field experiments, Study 1 and Study 2, were conducted at Saskatoon and Indian Head, SK, in western Canada. For Study 1, cultivar CDC Sedley was treated with 0-60 kg N ha −1 on long-term NT fields for 3 yr (2006)(2007)(2008). For Study 2, eight cultivars from three maturity classes were grown under control, inoculant, and N fertilizer regimes under NT at Saskatoon (2006 and2007). Lentil set more yield in early-flowering nodes via flower number, with 2.6 flowers node −1 . Late nodes had fewer (2.1) flowers but the same pod setting percentage of 80% for CDC Sedley, and a lower percentage across eight cultivars. Late nodes produced pods with greater growth rates and shorter filling times, resulting in fewer but similar sized pods. The largest pods were found on nodes with fewer flowers and when moisture was adequate during filling. Drought stress in 2007 occurred and lowered pod setting to 60% and shortened the effective pod-filling period during late reproductive drought. During the two wet years, higher N rates increased late-season pod growth rate, but not flower numbers. An increase in late node and flower production may further improve yield, particularly in largeseeded cultivars.Abbreviations: EFP, effective pod-filling period; NT, no-tillage; PGR, pod growth rate; SET, pod setting.

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