North American Bristlegrass Seed Yield Response to Nitrogen Fertilizer and Environment

López-García, J.; Ocumpaugh, W. R.; Ortega-Santos, J. Alfonso; Lloyd-Reilley, John; Muir, James P.

doi:10.2135/cropsci2010.01.0036

Cited by 3 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Singularly, there is evidence that heavier tillers and good N nutrition showed the greatest potential for flowering and seed production, in warm-season grasses (Canto et al, 2012). In a study with several newly native grasses, López-García et al (2011) found that inflorescence density was positively correlated to seed yield. Because of the high correlation of the PTN and greater ease of determination, this characteristic is the most appropriate indicator of ASY and PSY.…”

Section: Resultsmentioning

confidence: 99%

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Canto

Almeida

Costa

et al. 2016

Pesq. agropec. bras.

View full text Add to dashboard Cite

-The objective of this work was to evaluate the effects of closing cut dates (CCD) and nitrogen (N) rates on the components of pure seed yield (PSY) and seed quality in 'Mombasa' grass (Megathyrsus maximus 'Mombaça'), besides determining the parameters of apparent N efficiency (ANE) and agronomic N efficiency (AgNE). The field experiments were carried out over two growing seasons, 2010/2011 and 2011/2012, in Umuarama, PR, Brazil. The folllowing treatments were evaluated: CCD on October 10, January 31, February 15, and March 1; and N doses at 0, 75, 150, and 225 kg ha -1 . Significant interactions between the CCD and N doses were observed for the panicle tiller number (PTN), pure seeds per panicle, PSY, ANE and AgNE. Values of ANE and AgNE were better for 150 kg N ha -1 . There were no effects of CCD and N doses on seed quality. PSY was closely correlated with PTN, pure seeds per panicle, and pure seed number.The CCD treatments of longer growth duration and higher N doses showed the higher PSY. Final CCD delaying until February and N availability reduced yield. Closing cut date and N fertilization affect pure seed yield and yield component responses of 'Mombasa' grass.Index terms: agronomic nitrogen efficiency, apparent nitrogen efficiency, seed quality, seed yield. de N. A DR e o N não tiveram efeitos sobre a qualidade das sementes. O RSP foi estreitamente correlacionado ao NPP, às sementes puras por panícula e ao número de sementes puras. As DRs com maiores durações de crescimento e doses de N tiveram maiores RSP. O atraso da DR final até fevereiro e a disponibilidade de N reduziram os rendimentos. A data de rebaixamento e a adubação com N afetam as respostas do rendimento de sementes puras e as componentes do rendimento do capim-mombaça. Produção de sementes de capim-mombaça submetido a diferentes datas de rebaixamento e doses de nitrogênioTermos para indexação: eficiência agronômica de nitrogênio, eficiência aparente de nitrogênio, qualidade de sementes, rendimento de sementes.

show abstract

Section: Resultsmentioning

confidence: 99%

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Canto

Almeida

Costa

et al. 2016

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…The importance of N in the production of high yields of grass crops is well documented for various species (Fairey and Lefkovitch, 1998; Cookson et al, 2000; López‐García et al, 2011; Koeritz et al, 2013). In the present study, however, N application did not increase seed yield.…”

Section: Discussionmentioning

confidence: 99%

Influence of Row Spacing and P and N Applications on Seed Yield Components and Seed Yield of Siberian Wildrye (Elymus sibiricusL.)

et al. 2017

View full text Add to dashboard Cite

Siberian wildrye (Elymus sibiricus L.) is a globally important cool‐season forage grass for semiarid regions. However, its seed yield is often low or inconsistent. As previous studies examined the effects of row spacing and P and N levels on seed production of Siberian wildrye separately, this study was focused on the combined effects of four row spacings (30, 45, 60, 75 cm), four P application levels (0, 60, 90, 120 kg P ha−1), and four N application levels (0, 30, 60, 90 kg N ha−1). Treatments were established within a split‐split‐plot factorial arrangement, with main plots arranged in a randomized complete block design with four replicates. The field experiment was conducted on a Lithic Haprendoll soil type at the Guyuan farm in Hebei Province, China, during the 2010, 2011, and 2012 growing seasons with no supplemental irrigation. Narrow row spacing improved seed yield by increasing fertile tillers m−2, with 30 cm being the optimal row spacing. Phosphorus application increased seed yield by increasing spikelets per fertile tiller, with 90 kg P ha−1 being the optimal P application level. Nitrogen application had no significant influence on seed yield in any year. Path analysis structural equation modeling revealed that spikelets per fertile tiller and fertile tillers m−2 had significant and direct path coefficients with variances in seed yield. The best management practices for optimal seed yield of Siberian wildrye was 30‐cm row spacing, 90 kg P ha−1, and no additional N beyond 109 g kg−1 available soil N under rain‐fed conditions with annual rainfall <300 mm.

show abstract

Effects of Irrigation and Nitrogen Fertilization on Seed Yield, Yield Components, and Water Use Efficiency of Cleistogenes songorica

et al. 2021

View full text Add to dashboard Cite

Irrigation and nitrogen (N) are two crucial factors affecting perennial grass seed production. To investigate the effects of irrigation and N rate on seed yield (SY), yield components, and water use efficiency (WUE) of Cleistogenes songorica (Roshevitz) Ohwi, an ecologically significant perennial grass, a four-year (2016–2019) field trial was conducted in an arid region of northwestern China. Two irrigation regimes (I1 treatment: irrigation at tillering stage; I2 treatment: irrigation at tillering, spikelet initiation, and early flowering stages) and four N rates (0, 60, 120, 180 kg ha−1) were arranged. Increasing amounts of both irrigation and N improved SY, evapotranspiration, WUE, and related yield components like fertile tillers m−2 (FTSM) and seeds spikelet−1. Meanwhile, no significant difference was observed between 120 and 180 kg N ha−1 treatments for most variables. The highest SY and WUE was obtained with treatment combination of I2 plus 120 kg N ha−1 with four-year average values of 507.3 kg ha−1 and 1.8 kg ha−1 mm−1, respectively. Path coefficient and contribution analysis indicated that FTSM was the most important yield component for SY, with direct path coefficient and contribution coefficient of 0.626 and 0.592. Overall, we recommend I2 treatment (three irrigations) together with 120 kg N ha−1 to both increase SY and WUE, especially in arid regions. Future agronomic managements and breeding programs for seed should mainly focus on FTSM. This study will enable grass seed producers, plant breeders, and government program directors to more effectively target higher SY of C. songorica.

show abstract

North American Bristlegrass Seed Yield Response to Nitrogen Fertilizer and Environment

Cited by 3 publications

References 10 publications

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Influence of Row Spacing and P and N Applications on Seed Yield Components and Seed Yield of Siberian Wildrye (Elymus sibiricusL.)

Effects of Irrigation and Nitrogen Fertilization on Seed Yield, Yield Components, and Water Use Efficiency of Cleistogenes songorica

Contact Info

Product

Resources

About