Sensitivity of yield and grain nitrogen concentration of wheat, lupin and pea to source reduction during grain filling. A comparative survey under high yielding conditions

Sandaña, Patricio; Harcha, C.; Calderini, Daniel F.

doi:10.1016/j.fcr.2009.08.003

Cited by 56 publications

(42 citation statements)

References 53 publications

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“…Currently, the assessment of different source-sink ratios during grain filling has shown that wheat (Triticum aestivum L.) is mainly sinklimited (Slafer and Savin, 1994;Borrás et al, 2004;Zhang et al, 2010); however, Sandaña et al (2009) working in a high-yield environment, found that wheat is more affected by the source shortage than generally assumed. The physiological bases accounting for the responses reported by Sandaña et al (2009) are especially important in southern Chile, taking into account that crop production systems are based on temperate cereals, which are favored by high grain weight potential. Thus, a better understanding of the causes behind the higher-thanexpected sensitivity of wheat-to-source reduction could improve the knowledge of physiological traits controlling grain weight of wheat in favorable environments.…”

Section: Introductionmentioning

confidence: 99%

“…Nets had little effect on air temperature as the average temperature under the nets was 1 °C lower than in controls (Sandaña et al, 2009). Aimed at reducing the source of assimilates only during the linear growth phase of the grain treatments, ShAll and Sh1st began At +12 d (Fischer, 1985;Savin and Slafer, 1991).…”

Section: Manipulation and Calculation Of The Source-sink Ratiomentioning

confidence: 99%

“…This aspect is clearly relevant considering that wheat could be affected by source shortage at different moments during grain filling, thereby forcing the crop to use reserves, which could be insufficient to fill the grains, particularly under high yield conditions (Calderini et al, 2006;Sandaña et al, 2009;Serrago et al, 2013). Therefore, the sensitivity of wheat to source reductions Entire bars show the crop season from emergence to physiological maturity in the control treatment.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have assessed the effect of different source-sink ratios on wheat yield and grain weight (Fischer and Laing, 1976;Fischer, 1985;Savin and Slafer, 1991;Slafer and Savin, 1994;Borrás et al, 2004;Sandaña et al, 2009;Serrago et al, 2013); but less information is available about the mechanisms involved in the sourcesink response. Given that grain water content has been found to be a key trait in determining wheat grain weight (Egli, 1990;Saini and Westgate, 2000;Pepler et al, 2006, Hasan et al, 2011, and considering the close balance between water and DM in growing grains (Schnyder and Baum, 1992;Calderini et al, 2000;Saini and Westgate, 2000;Pepler et al, 2006), studying grain water content in response to the source-sink reduction during grain filling could provide useful information on grain growth and its responsiveness to source constraints of wheat as has been shown in maize (Borrás et al, 2003;Borrás and Westgate, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Dry matter and water dynamics of wheat grains in response to source reduction at different phases of grain filling

Harcha

Calderini

2014

Chilean J. Agric. Res.

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Agreement that wheat (Triticum aestivum L.) is scarcely limited by source of assimilates during grain fill has not been confirmed when source was drastically decrease in high yield potential environments. Dry matter (DM) and water dynamics of growing grains being possibly able to explain grain weight (GW) responses to source-sink ratios (S-Sratios) in these conditions. Objectives were to evaluate response of GW to S-Sratios at different phases during grain fill, and relationship between DM and grain water content in response to different S-Sratios. Wheat was sown at field conditions during 2004-2005 and 2005-2006 growing seasons. Four S-Sratios were assessed: Control without S-Sratios modification (C), S-Sratios from anthesis (At) +12 d to physiological maturity (ShAll), S-Sratios from At +12 d to first half of grain fill (Sh1st) and from second half of grain fill to maturity (Sh2nd). Thousand grain weight (TGW), GW at individual positions (IGW), stabilized grain water content (SGWC) and grain filling rate (GFR) were measured. TGW sensitivity to S-Sratios varied according to length of treatment and its timing, i.e. ShAll, Sh1st, and Sh2nd treatments reduced TGW by 48%, 26%, and 22%, respectively. These reductions were little higher when IGW were evaluated in ShAll (i.e. 53%) and Sh1st (i.e. 33%) treatments and lower in Sh2nd (i.e. 12%). SGWC sensitivity was lower than that of IGW across S-Sratios (e.g. ShAll 27%, Sh1st 22%, and Sh2nd 5%). However, close association between IGW and SGWC (R 2 = 0.78, p ≤ 0.001) and between GFR and SGWC (R 2 = 0.98, p ≤ 0.001) was found regardless of S-Sratios and seasons.

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Section: Introductionmentioning

confidence: 99%

Section: Manipulation and Calculation Of The Source-sink Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dry matter and water dynamics of wheat grains in response to source reduction at different phases of grain filling

Harcha

Calderini

2014

Chilean J. Agric. Res.

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“…Batten, 1992;Gahoonia et al, 1999;Manske et al, 2001). In Southern Chile (40° S, 70° W) wheat is the most sown grain crop and pea could also be considered as an alternative crop for plant protein production (Sandaña et al, 2009). Some field and glasshouse experiments directly comparing these crop groups have shown that wheat has a higher response to P supply than grain legumes (Bolland et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Grain yield and phosphorus use efficiency of wheat and pea in a high yielding environment

Sandaña

Pinochet

2014

J. Soil Sci. Plant Nutr.

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The aim of the present study was to evaluate the response of grain yield, phosphorus (P) use efficiency (PUE, g yield g -1 P available) and related root traits of wheat and pea to different P availabilities in a high yielding environment (e.g.: yield higher than 10 Mg ha -1 for wheat). Two experiments were conducted in southern Chile. Treatments consisted of the combination of (i) two crops (spring-bred wheat and pea) and (ii) three rates of P fertilization (0 (P0), 100 (P1) and 250 (P2) kg P ha -1 ). Grain yield of wheat was more sensitive to P deficiency than pea. Wheat showed consistently higher (P < 0.01) PUE than pea, averaging 195 and 125 g yield g -1 P available, respectively. This was principally ascribed to the highest (P < 0.01) P utilization efficiency of wheat (430 vs. 249 g yield g -1 P uptake for wheat and pea, respectively). On the contrary, the P uptake efficiency was slightly different for these crops (0.44 and 0.49 g P g -1 P available, respectively). However, these crops presented different strategies for P acquisition. Wheat had a higher (P < 0.01) soil exploratory capacity than pea, while pea showed a higher (P < 0.01) P uptake per unit of root length than wheat. Wheat showed higher PUE than pea; however, crop differences are ascribed to differences in phosphorus utilization rather than to phosphorus uptake efficiency. This information could contribute to optimized soil P use and improved crop fertilization management.

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Effect of slow‐release nitrogen on the nitrogen availability in an andisol and the critical nitrogen concentration in wheat

Clunes

Pinochet

2020

Agronomy Journal

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The use of coated fertilizers and the concept of the critical N dilution curve are alternatives capable of improving the production efficiency of wheat (Triticum aestivum L.) crops in agro-ecosystems. The objectives of this work were to evaluate the effect of a slow release urea-coated fertilizer on (i) the production of wheat's shoot biomass at the anthesis stage, (ii) the concentration of N in the shoot biomass, and (iii) the N availability in the Andisol. Two fertilizers: urea and urea-coated were evaluated using four increasing N rates and a control treatment (without fertilization), in three application strategies, during two growing seasons (late sowing [S1] and early sowing [S2]). Samples of shoot biomass and soil (0-20-cm depths) were collected at five wheat growth stages (Z21, Z31, Z39, Z45, Z69 on the Zadoks scale). The average production of shoot biomass was 10.3 t dry matter (DM) ha -1 for S2 and 7.9 t DM ha -1 for S1 and N concentrations was between 1.0-3.0%. When using a coated urea fertilizer in this Valdivian agro-ecosystem, no statistical differences (P < .05) in shoot biomass or wheat N concentrations were found at anthesis (Z69). Differences were principally between seasons. We therefore proposed a new adjustment to the dilution N curve, with a value concentration critical, N c start of 3.80%, and 4.15%, for S1 and S2, respectively. Use demand parameters such as N c adjusted to the agro-ecosystem for wheat crop, allows to rationalize the fertilization according to inorganic N available from the soil.Abbreviations: AS, all of the fertilizer was applied at sowing; AT, all of the fertilizer was applied at the end of tillering; CU, Nutrisphere-Urea; DM, dry matter; GDD, growing degree days; N c , critical nitrogen concentration; NNI, nitrogen nutrition index; S1, season 1; S2, season 2; SA, split application with one-third applied at sowing and two-thirds at the end of tillering; U, urea.

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Sensitivity of yield and grain nitrogen concentration of wheat, lupin and pea to source reduction during grain filling. A comparative survey under high yielding conditions

Cited by 56 publications

References 53 publications

Dry matter and water dynamics of wheat grains in response to source reduction at different phases of grain filling

Dry matter and water dynamics of wheat grains in response to source reduction at different phases of grain filling

Grain yield and phosphorus use efficiency of wheat and pea in a high yielding environment

Effect of slow‐release nitrogen on the nitrogen availability in an andisol and the critical nitrogen concentration in wheat

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