EFFECTS OF CARBON DIOXIDE AND PHOSPHORUS SUPPLY ON POTATO DRY MATTER ALLOCATION AND CANOPY MORPHOLOGY

2013 ◽  
Vol 36 (4) ◽  
pp. 566-586 ◽  
Author(s):  
D. H. Fleisher ◽  
Q. Wang ◽  
D. J. Timlin ◽  
J.-A. Chun ◽  
V. R. Reddy
1991 ◽  
Vol 83 (5) ◽  
pp. 875-883 ◽  
Author(s):  
L. H. Allen ◽  
E. C. Bisbal ◽  
K. J. Boote ◽  
P. H. Jones

1995 ◽  
Vol 58 (6) ◽  
pp. 673-677 ◽  
Author(s):  
SLAVEN ALJINOVIC ◽  
CARL J. BERN ◽  
PRINCE N. DUGBA ◽  
MANJIT K. MISRA

Carbon dioxide evolution was used to determine the storage life of 22.7% moisture shelled corn. Four iprodione fungicide treatments plus an untreated control were tested. The fungicide was tested on corn having three levels of mechanical kernel damage: 7% (hand shelled), 25% (combine harvested), and 16% (a blend of the other two damage levels). All iprodione treatments significantly increased storage life. Corn samples with higher levels of kernel damage took shorter times to reach the 0.5% dry-matter loss (DML) level. For combine-shelled corn, the fungicide increased storage life 17% at 15 mg/kg of corn and 46% at 20 mg/kg of corn.


Animals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 232
Author(s):  
Yuxia Chen ◽  
Dan Shen ◽  
Lilan Zhang ◽  
Ruqing Zhong ◽  
Zhengqun Liu ◽  
...  

This study was carried out to evaluate the effect of the addition of the non-starch polysaccharide enzymes cocktail (NSPEC) on growth performance, nutrient digestibility and gas emissions in a corn-miscellaneous meal-based diet for finishing pigs. The NSPEC is a combination of cellulase, xylanase, β-glucanase, β-mannanase, α-galactosidase and pectinase optimized by assessing the in vitro dry matter digestibility (IVDMD) of corn-miscellaneous meal diet using an in vitro method of simulating digestion in the stomach and intestine of growing pigs. Growth performance and apparent total tract digestibility (ATTD) of nutrients and energy were measured. The gas concentration of ammonia, carbon dioxide, nitrous oxide and methane in the environmental assessment chambers were determined. The gas detecting period was divided into three frequencies of manure removal of every 1d, 2d and 3d. The addition of NSPEC into the corn-miscellaneous meal diet decreased feed conversation rate (FCR) and increased the ATTD of dry matter, crude protein, gross energy, neutral detergent fiber and acid detergent fiber of pigs (p < 0.05). The digestible energy was also improved (p < 0.05) significantly by NSPEC supplementation in the diet. Furthermore, the supplementation of the NSPEC reduced (p < 0.05) carbon dioxide concentration in the chambers. The ammonia emissions were significantly increased according to average 1d, 2d and 3d manure removal procedures (p < 0.01). These results indicated that the inclusion of optimal NSPEC in a corn-miscellaneous meal diet improved growth performance, nutrient digestibility and reduced carbon dioxide emissions on finishing pigs. The accumulated manure could increase the release of ammonia in a pig house.


1971 ◽  
Vol 22 (1) ◽  
pp. 39 ◽  
Author(s):  
KS Fischer ◽  
GL Wilson

The relative contributions of different photosynthetic sites to the filling of the grain in grain sorghum (Sorghum vulgare cv. Brolga) were estimated by measuring the 14C in the grain after exposing various leaves and the head to radioactive carbon dioxide. Methods for preventing photosynthesis were also used. Of the grain yield, 93% was due to assimilation by the head and upper four leaves. The head contribution of 18 % was due equally to direct assimilation of atmospheric carbon dioxide and to reassimilation of carbon dioxide released within the grain by respiration of material translocated from the leaves. The remaining 75 % was equally assimilated by the upper four leaves, the flag leaf being the most efficient contributor per unit area and the third uppermost leaf the least efficient. The percentage contributions to the grain by the flag leaf and fourth leaf, estimated from the decrease in grain yield when they were shaded, agreed closely with the estimates obtained by using 14CO2.


Sign in / Sign up

Export Citation Format

Share Document