The ridge-furrow system combined with supplemental irrigation strategies to improves radiation use efficiency and winter wheat productivity in semi-arid regions of China

To better understand the potential for improving biomass accumulation and radiation use efficiency (RUE) of winter wheat under deficit irrigation regimes, in 2006–2007 and 2007–2008, an experiment was conducted at the Luancheng Experimental Station of Chinese Academy of Science to study the effects of deficit irrigation regimes on the photosynthetic active radiation (PAR), biomass accumulation, grain yield, and RUE of winter wheat. In this experiment, field experiment involving winter wheat with 1, 2 and 3 irrigation applications at sowing, jointing, or heading stages was conducted, and total irrigation water was all controlled at 120 mm. The results indicate that irrigation 2 or 3 times could help to increase the PAR capture ratio in the later growing season of winter wheat; this result was mainly due to the changes in the vertical distributions of leaf area index (LAI) and a significant increase of the LAI at 0–20 cm above the ground surface (LSD, P < 0.05). Compared with irrigation only once during the growing season of winter wheat, irrigation 2 times significantly (LSD, P < 0.05) increased aboveground dry matter at maturity; irrigation at sowing and heading or jointing and heading stages significantly (LSD, P < 0.05) improved the grain yield, and irrigation at jointing and heading stages provided the highest RUE (0.56 g/mol). Combining the grain yield and RUE, it can be concluded that irrigation at jointing and heading stages has higher grain yield and RUE, which will offer a sound measurement for developing deficit irrigation regimes in North China.

Download Full-text

Effects of water and temperature stresses on radiation use efficiency in a semi-arid grassland

Journal of Plant Interactions ◽

10.1080/17429145.2011.564736 ◽

2012 ◽

Vol 7 (3) ◽

pp. 214-224 ◽

Cited By ~ 13

Author(s):

Tserenpurev Bat-Oyun ◽

Masato Shinoda ◽

Mitsuru Tsubo

Keyword(s):

Radiation Use Efficiency ◽

Temperature Stresses ◽

Use Efficiency ◽

Radiation Use ◽

Semi Arid

Download Full-text

Índices Morfofisiológicos e Uso de Radiação Solar por um Cultivo de Cana-de-Açúcar Irrigada no Semiárido Brasileiro (Morphophysiological Indices and Radiation Use by an Irrigated Sugarcane Crop in the Brazilian Semi-Arid)

Revista Brasileira de Geografia Física ◽

10.26848/rbgf.v7.4.p764-773 ◽

2014 ◽

Vol 7 (4) ◽

pp. 764

Author(s):

Thieres George Freire da Silva ◽

Magna Soelma Beserra de Moura ◽

Sérgio Zolnier ◽

Luciana Sandra Bastos de Souza ◽

José Francisco Alves do Carmo

Keyword(s):

Extinction Coefficient ◽

Growth Patterns ◽

Photosynthetic Active Radiation ◽

Radiation Use Efficiency ◽

Area Index ◽

Active Radiation ◽

Maximum Value ◽

Use Efficiency ◽

Radiation Use ◽

Semi Arid

Os índices morfofisiológicos e parâmetros de eficiência do uso de radiação foram determinados para a cana-de-açúcar irrigada, RB92579. O experimento foi conduzido no município de Juazeiro-BA, Semiárido brasileiro. Foram obtidas medições de biomassa seca acumulada pelas folhas, colmos e total da parte aérea, e do índice de área foliar. Adicionalmente, dados de radiação solar global e de radiação fotossinteticamente ativa foram medidos acima e abaixo do dossel da cultura. Por meio desses dados foram calculados os índices morfofisiológicos, a fração da radiação fotossinteticamente ativa (fRFA), o coeficiente de extinção (ke), o uso eficiente de radiação (UER) e a eficiência fotossintética (EFT). A taxa de crescimento absoluto aumentou substancialmente até atingir o valor máximo de 41,8 g m-2 d-1 aos 200 dias após o corte (DAC). O valor máximo de fRFA foi em torno de 99%, permanecendo constante dos 213 DAC até o final do ciclo. A magnitude do parâmetro ke foi 0,72. Baseado nas medições do BSTPA verificou-se que os valores aproximados de EFT e UER foram 2,67 g MJ-1 e 1,29 g MJ-1, respectivamente. Os resultados mostraram que a cana-de-açúcar irrigada no Semiárido brasileiro possui padrões de crescimento superiores aos de outros ambientes de cultivo registrados na literatura. A B S T R A C T The morphphysiological indices and parameters of radiation use efficiency were determined for irrigated sugarcane, RB92579 cultivar. The experiment was carried out in the district of Juazeiro, State of the Bahia, located in the Brazilian semi-arid. Measurements of dry biomass accumulated by leaves, stalk and total shoot, and leaf area index (LAI) were carried out. Additionally, global solar radiation and photosynthetic active radiation were measured above and below the crop canopy. Using these data, morphphysiological indices, the photosynthetic active radiation fraction (fPAR), the extinction coefficient (ke), the radiation efficient use (REU) and the photosynthetic efficiency (PTE) were calculated. The absolute growth rate tended to increase substantially until reaching the maximum value of 41.8 g m-2 d-1, which was observed 200 days after cutting (DAC). The maximum value of the fPAR was around 99%, remaining constant from 213 DAC until the end of the crop cycle. The magnitude of the ke parameter was 0.72. Based on measurements of DBTS, it was verified that the approximate values of the PTE and REU were 2.67 g MJ-1 and 1.29 g MJ-1, respectively. Results showed that the irrigated sugarcane has excellent growth patterns when cultivated under semi-arid conditions when compared to others environments cited in literature. Keywords: growth, extinction coefficient, radiation use efficiency.

Download Full-text

Radiation use efficiency and yield of winter wheat under deficit irrigation in North Chin

Plant Soil and Environment ◽

10.17221/421-pse ◽

2008 ◽

Vol 54 (No. 7) ◽

pp. 313-319 ◽

Cited By ~ 18

Author(s):

H. Han ◽

Z. Li ◽

T. Ning ◽

X. Zhang ◽

Y. Shan ◽

...

Keyword(s):

Winter Wheat ◽

Grain Yield ◽

Deficit Irrigation ◽

North China ◽

Radiation Use Efficiency ◽

Area Index ◽

Significant Difference ◽

Use Efficiency ◽

Jointing Stage ◽

Radiation Use

Water stress is a frequent and critical limit to wheat (Triticum aestivum L.) production in North China. It has been shown that photosynthetic active radiation (PAR) is closely related to crop production. An experiment was conducted to investigate the effects of deficit irrigation and winter wheat varieties on the PAR capture ration, PAR utilization and grain yield. Field experiments involved Jimai 20 (J; high yield variety) and Lainong 0153 (L; dryland variety) with non-irrigation and irrigated at jointing stage. The results showed that whether irrigated at jointing stage or not, there was no significant difference between J and L with respect to the amount of PAR intercepted by the winter wheat canopies. However, significant differences were observed between the varieties with respect to the amount of PAR intercepted by plants that were 60–80 cm above the ground surface. This result was mainly caused by the changes in the vertical distributions of leaf area index (LAI). As a result, the effects of the varieties and deficit irrigation on the radiation use efficiency (RUE) and grain yield of winter wheat were due to the vertical distribution of PAR in the winter wheat canopies. During the late growing season of winter wheat, irrespective of the irrigation regime, the RUE and grain yield of J were significantly (LSD, P < 0.05) higher than those of L. These results suggest that a combination of deficit irrigation and a suitable winter wheat variety should be applied in North China.

Download Full-text