EFFECTS OF 4 MODERATE WATER REGIMES ON SEASONAL CHANGES IN VINEYARD EVAPOTRANSPIRATION AND DRY MATTER PRODUCTION UNDER SEMI-ARID CONDITIONS

1999 ◽  
pp. 253-260
Author(s):  
E. Cuevas ◽  
P. Baeza ◽  
J.R. Lissarrague
Keyword(s):  
Seasonal Changes ◽  
Dry Matter ◽  
Dry Matter Production ◽  
Water Regimes ◽  
Arid Conditions ◽  
Matter Production ◽  
Semi Arid

scholarly journals AGRONOMIC TRAITS EVALUATION IN IRRIGATED SORGHUM IN THE BRAZILIAN SEMI-ARID

2020 ◽  
Vol 19 ◽  
pp. 14
Author(s):  
AMADEU REGITANO NETO ◽  
RAFAEL DANTAS DOS SANTOS
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Dry Matter ◽  
Agronomic Traits ◽  
Dry Matter Production ◽  
Matter Production ◽  
Green Matter ◽  
Sorghum Genotypes ◽  
Highly Correlated ◽  
Semi Arid

Green and dry matter production, along with grain yield and otheragronomic traits, were assessed in 44 sorghum genotypes. Two sets of genotypes were formed based on known plant height, aiming to evaluate green and dry matter production and grain yield, as well as to separate forage and grain sorghum genotypes. The evaluations were performed based on experiments with three replications, being one irrigated (drip system) in Petrolina, State of Pernambuco, and the other rainfed, in Nossa Senhora da Glória, state of Sergipe, Brazil. Sowing dates were July 30, 2016, in Nossa Senhora da Glória; July 13, 2017, and October 24, 2018, in Petrolina; with 117 and 128 days from sowing to harvest, respectively. Expressive forage production was observed in genotypes EP-17 and SF-11, which exceeded 120 t ha-1. BRS 506 produced 108 t ha-1, while 13F03(1141572), P-294, P-288, 2502 x 467, BRS Ponta Negra, and SF-15 presented green matter production ranging from 94 to 98.5 t ha-1. Dry matter production was highly correlated with green matter production, and SF-11 had the best performance of 45.5 t ha-1. The observed plant height was more expressive for forage sorghum genotypes, being this trait highly correlated with the green and dry matter. The best grain yield performance reached 13.4 and 10.3 t ha-1, values observed for 9910032 and BRS Ponta Negra, respectively. The results demonstrate the full adaptability of sorghum to the semi-arid environment and the feasibility to produce roughage and grains under irrigation in the Brazilian semi-arid region.

Seasonal changes in the concentrations of copper, molybdenum and sulfur in pasture plants

1981 ◽  
Vol 21 (112) ◽  
pp. 498 ◽  
Author(s):  
GD Reddy ◽  
AM Alston ◽  
KG Tiller
Keyword(s):  
Soil Temperature ◽  
Water Content ◽  
Seasonal Changes ◽  
Dry Matter ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Dry Matter Production ◽  
Calcareous Sand ◽  
Matter Production ◽  
Wimmera Ryegrass

Seasonal changes in the concentrations of copper, molybdenum and sulfur in subterranean clover (Trifolium subterraneum), silver grass (Vulpia sp.), Wimmera ryegrass (Lolium rigidum), and capeweed (Arctotheca calendula) growing on lateritic podzolic soils were measured in glasshouse and field studies. The effects of varying soil temperature and water content on the concentrations of copper, molybdenum and sulfur in subterranean clover on a lateritic podzolic soil and a calcareous sand were also investigated. Similar seasonal patterns in plant composition were observed in the glasshouse and the field. The concentration of molybdenum tended to remain constant throughout the season, but that of copper and sulfur declined from autumn to spring; the decline was more rapid in the grasses than in subterranean clover and capeweed. Subterranean clover had higher concentrations of copper and sulfur but lower molybdenum than silver grass or Wimmera ryegrass. Capeweed contained more copper and molybdenum but less sulfur than subterranean clover. The concentrations of molybdenum and sulfur were similar in capeweed and the grasses. lncreasing soil temperature from 12 to 22�C increased the dry matter production and the concentrations of copper and molybdenum (but not sulfur) in subterranean clover on both soils. lncreasing soil water content slightly increased dry matter production and the concentration of molybdenum but had no effect on the concentration of copper and sulfur in subterranean clover. The results are discussed in relation to the health of grazing animals.

Season and plant type affect the response of rice yield to nitrogen fertilisation in a semi-arid tropical environment

1998 ◽  
Vol 49 (2) ◽  
pp. 179 ◽  
Author(s):  
A. K. Borrell ◽  
A. L. Garside ◽  
S. Fukai ◽  
D. J. Reid
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Dry Matter ◽  
Dry Season ◽  
Dry Matter Production ◽  
Northern Australia ◽  
Plant Type ◽  
Matter Production ◽  
Early Maturing ◽  
Semi Arid

Production of flooded direct-seeded rice (Oryza sativa L.) in semi-arid tropical regions of northern Australia would be enhanced by increasing the efficiency of fertiliser nitrogen (N) use. Short-statured and early-maturing genotypes have replaced the taller and later genotypes in northern Australia, and they may respond differently to N. This paper reports the results of 4 experiments comparing the response of 3 rice genotypes differing in maturity and stature to 5 rates of applied nitrogen (0, 70, 140, 210, and 280 kg/ha) over 4 seasons (2 wet and 2 dry seasons) in the Burdekin River Irrigation Area, northern Australia. Grain yield varied among seasons and was negatively correlated with average daily mean temperature during the 30-day period before anthesis. The response of yield to N fertilisation was generally higher in the dry season. Panicle number was correlated with grain yield in both seasons, yet responded to N fertilisation only in the dry season. In 3 of 4 experiments, grain yield responded to the application of up to 70 kg N/ha, yielding about 750 g/m2. In only 1 dry season experiment did grain yield respond to the application of 140 kg N/ha, yielding about 930 g/m2. In this experiment, the response of grain yield to N rate also varied among genotypes such that yield in the early-maturing genotypes (Newbonnet and Lemont) was more responsive to N rates above 70 kg/ha than in the late-maturing genotype (Starbonnet). Of the 3 genotypes examined, highest yields were attained in Newbonnet (early-maturing, medium-statured) by combining high total dry matter production with high harvest index, indicating that this plant type may have an advantage in northern Australia. Yields in Lemont (early-maturing, short-statured) and Starbonnet (late-maturing, tall-statured) were limited by dry matter production and harvest index, respectively. There is some evidence that increased dry matter production in Newbonnet compared with Lemont was related to increased stem length. The evidence linking high harvest index with increased earliness in Newbonnet compared with Starbonnet is less compelling.

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