Effect of Different Rates of Nitrogen and Irrigation on Dry Matter and Nitrogen Content of Corn at Different Growth Stages During Two Sowing Dates

Well-watered crops of sweet sorghum (cv. Wray) and forage sorghum (cv. Silk) were grown in south-eastern Queensland. Treatments consisted of four sowing dates, two intra-row spacings and harvests taken at six physiological growth stages from the third ligule to 3 weeks after grain maturity. Plant density effects on the concentration of sugars and nitrogen were slight, and changes in yields of these components were a function of density effects on dry matter yields. At any growth stage, the concentration of sugars in both cultivars was decreased with delay in sowing date. The delay in sowing date led to an increased nitrogen concentration in cv. Wray, but in cv. Silk the nitrogen concentration was highest in early and late sowings. At maturity, the concentration of sugars in cv. Wray averaged 40'70, 10 times the level in cv. Silk. In both cultivars, accumulation was a near linear function of either time or radiation sum. The partitioning of carbohydrate differed little between cultivars but altered with their ontogeny. The efficiency of light use for sugars production was greater in cv. Wray and altered with ontogeny. In contrast, concentration of nitrogen was similar for both cultivars and decreased curvilinearly with time or degree days. The partitioning of nitrogen altered with ontogeny and the amount partitioned to leaf material was greater in cv. Silk pre-anthesis but was less post-anthesis. Yield of stem sugars in cv. Wray exceeded 10 t ha-1 when the crops were sown early in the season, but was only 3 t ha-1 with late-sown crops.

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Response of dry matter partition and yield components to waterlogging and sunlight shortage in different growth stages of wheat

Natural Hazards ◽

10.1007/s11069-021-04984-3 ◽

2021 ◽

Author(s):

Min Jiang ◽

Shouli Xuan ◽

Muhammad Atif Muneer ◽

Bin Sun ◽

Chunlin Shi ◽

...

Keyword(s):

Yield Components ◽

Dry Matter ◽

Growth Stages ◽

Different Growth Stages

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Nutrient digestibility of alfalfa at different growth stages on sheep and goat

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200013521 ◽

2003 ◽

Vol 2003 ◽

pp. 193-193

Author(s):

M. M. Moeini ◽

M. Souri ◽

F. Hozabri ◽

M. R. Sanjabi

Keyword(s):

Dry Matter ◽

Growth Stage ◽

Animal Feed ◽

Maximum Yield ◽

Nutrient Digestibility ◽

Growth Stages ◽

Preparation Methods ◽

Nutritive Values ◽

High Forage ◽

Different Growth Stages

The nutritive values of animal feed are dependents on plant species, stages of maturity, harvesting and preparation methods. Legumes provide maximum yield, high forage quality (protein, mineral and digestible energy). Legumes decrease in protein and digestible dry matter and increase in fibre as they increase in growth or in maturity (Hochensmith et al., 1997). Alfalfa (medica sativa) is world unique forage in livestock food. This study was conducted to examine the chemical composition and nutrient digestibility of Hamadanian alfalfa forage at different growth stage on two local Iranian sheep and goat breeds.

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Effect of silicon at panicle initiation on the growth of rice (Var. ADT-36) plants at different growth stages

Acta Agronomica Hungarica ◽

10.1556/aagr.50.2002.2.9 ◽

2002 ◽

Vol 50 (2) ◽

pp. 179-184

Author(s):

P. M. Arthanari ◽

P. Gnanamoorthy ◽

S. Ramasamy

Keyword(s):

Tamil Nadu ◽

Dry Matter ◽

Field Experiments ◽

Dry Matter Production ◽

Growth Stages ◽

Maturity Stage ◽

Maturity Stages ◽

Matter Production ◽

Initiation Stage ◽

Different Growth Stages

Field experiments were conducted at Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India during the Rabi (November 1997-March 1998) and Kharif (July 1998-November 1998) seasons to identify the effect of silicon at panicle initiation on the growth of rice plant (Variety ADT-36) at different growth stages. Furnace slag was applied as a silicon source at 2 t/ha at the panicle initiation stage along with other nutrients. The dry matter production was recorded at the active tillering, panicle initiation, booting, flowering, one week after flowering and maturity stages in both the seasons. The total dry matter production was greater in the Kharif season than in the Rabi season. The application of slag at the panicle initiation stage along with N and K at the flowering stage had a significant influence over the dry matter production. A similar trend was observed in both the seasons. The silicon uptake was recorded at the panicle initiation and maturity stages. About 30-40% of the silicon absorbed during the early stages and the maturity stage was present in the shoot, whereas 20-30 % of the silicon absorbed during the maturity stages was present in the leaf blades. Based on the results, it is concluded that the supply of silicon during the panicle initiation stage is most important for plant growth.

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Effects of heat processing on digestible energy and other nutrient digestibilities of full-fat soybeans fed to weaner, grower and finisher pigs

Canadian Journal of Animal Science ◽

10.4141/cjas93-043 ◽

1993 ◽

Vol 73 (2) ◽

pp. 411-419 ◽

Cited By ~ 18

Author(s):

Bruno J. Marty ◽

Eduardo R. Chavez

Keyword(s):

Crude Protein ◽

Dry Matter ◽

Heat Treatments ◽

Neutral Detergent Fiber ◽

Heat Processing ◽

Growth Stages ◽

Ether Extract ◽

Digestible Energy ◽

Weaner Pigs ◽

Different Growth Stages

The influence of different heat treatments for full-fat soybeans (FFSB) on digestible energy (DE) values and fecal nutrient digestibilities was studied using 180 castrated male Landrace pigs at three different growth stages: weaner (17.1 ± 0.2 kg), grower (32 ± 0.2 kg) and finisher (61.6 ± 0.3 kg). The soybean products used in weaner (30%), grower (25%) and finisher (20%) diets were soybean meal (SBM) or FFSB processed by either extrusion (Ex), jet sploding (Js), micronization (Mi) or roasting (Ro). Digestibilities were determined by total fecal collections during the last 7 d of each 12-d period. Dry matter (DM) and neutral detergent fiber (NDF) digestibilities of FFSB were lower (P < 0.05) in weaner than in grower or finisher pigs, but DE values and apparent digestibilities of crude protein (CP) and ether extract were not influenced by growth stage. Extruded FFSB had a superior CP digestibility than the other soybean products (86.4 vs. 79.8, 79.8, 80.0 and 78.2% for Js, Mi, Ro and SBM, respectively), and it also had a higher DE value (21.0 vs. 20.0, 19.6, 18.5 and 16.6 MJ DE kg−1 DM, P < 0.05). Extrusion of FFSB was most beneficial for weaner pigs as this heat treatment resulted in higher (P < 0.05) CP (87.8 vs. 80.9, 80.8, 82.1 and 76.6% for Js, Mi, Ro and SBM, respectively) and NDF (76.2 vs. 62.7, 63.3, 61.9 and 53.8% for Js, Mi, Ro and SBM, respectively) digestibilities. The heat treatments did not influence the CP and NDF digestibilities during grower or finisher stages. The data suggested that extrusion of FFSB yielded superior DE values and CP digestibilities than other heat treatments. Key words: Full-fat soybean products, extrusion, digestibility, pigs

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Influence of Sowing Dates on the Phenological Development, Growth and Yield Of White Maize Genotypes

Bangladesh Agronomy Journal ◽

10.3329/baj.v24i1.55546 ◽

2021 ◽

Vol 24 (1) ◽

pp. 57-70

Author(s):

S Akhtar ◽

MJ Ullah ◽

A Hamid ◽

MS Islam ◽

MKU Ahamed ◽

...

Keyword(s):

Dry Matter ◽

Seedling Emergence ◽

Winter Season ◽

Sowing Date ◽

Growth And Yield ◽

Growth Stages ◽

Maturity Stage ◽

Yield Attributes ◽

Maize Genotypes ◽

Sowing Dates

The experiment was conducted at the Sher-e-Bangla Agricultural University (90o22 E, 23o 41 N), Dhaka, Bangladesh in Rabi (winter) season of 2017-2018 to study the effects of sowing date on growth and yield of four white maize genotypes, viz. PSC-121, Yangnuo-7, Yungnuo-30 and Changnuo-6. Sowing dates were November 26, December 11, and December 26. Data were collected on different phenological growth stages, dry matter, physiological attributes, yield, and yield attributes. A delay in sowing date delayed the time required for seedling emergence, to reach the 6-leaf collar, maturity stage, and also reduced yield. The planting of PSC-121 in November 26 gave the highest dry matter plant-1, the number of grains cob-1, and 100- grain weight that resulted in the highest grain yield (11.65 t/ha) of the genotype. Bangladesh Agron. J. 2021, 24(1): 57-70

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Mow-kill Regulation of Winter Cereals for Spring No-till Crop Production

Weed Technology ◽

10.1017/s0890037x00039890 ◽

1996 ◽

Vol 10 (2) ◽

pp. 247-252 ◽

Cited By ~ 10

Author(s):

Erik D. Wilkins ◽

Robin R. Bellinder

Keyword(s):

Soil Temperature ◽

Crop Production ◽

Dry Matter ◽

Field Studies ◽

Bare Soil ◽

Growth Stages ◽

Winter Cereals ◽

No Till ◽

Soil Temperatures ◽

Different Growth Stages

Field studies determined the influence of developmental stage on mow-killing of winter wheat and rye. Both crops were clipped at either three or four different growth stages in 1992 and 1993. When mowed at first node, wheat biomass was 4350 and 1970 kg/ha in 1992 and 1993, respectively. At this stage, primary tiller apices were below 10 cm and regrowth was vigorous. Mowing prior to 75% heading consistently yielded more than 1000 kg/ha regrowth 8 wk later. Wheat cut after flowering produced 15 460 and 9160 kg/ha dry matter in 1992 and 1993, respectively, but less than 30 kg/ha total regrowth. At first and second node, rye produced 4440 and 1800 kg/ha biomass in 1992 and 1993. When mowed belore boot, more than 50% of the total rye biomass was due to regrowth. Rye mowed at boot yielded 6940 and 3740 kg/ha in 1992 and 1993 respectively, and regrowth measured 780 and 910 kg/ha 8 wk later. Mowing after flowering resulted in no measurable regrowth. Soil temperature and PAR were affected by mow-kill date and biomass. Biomass at first mowings (first and second node) in both wheat and rye reduced seasonal soil temperatures 3.5 C compared to bare soil temperatures; while biomass at kernal-filling lowered temperatures 6.0 C. Measured 8 wk after mowing, first node mowings absorbed between 55% and 70% PAR, while plants mowed at kernal-filling absorbed less than 5%.

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