scholarly journals Effects of Nitrogen Fertilization on Dark-Respiration and Growth Efficiency of Field-Grown Rice Plants

2000 ◽  
Vol 3 (3) ◽  
pp. 238-242 ◽  
Author(s):  
Kuniyuki Saitoh ◽  
Toshiyuki Doi ◽  
Toshirou Kuroda
Keyword(s):  
Nitrogen Fertilization ◽  
Dark Respiration ◽  
Growth Efficiency ◽  
Rice Plants

scholarly journals Effects of the Excessive Suppression of Tillering by Deep-Flood Irrigation and Nitrogen Fertilization on the Emergence of Upper Nodal Tillers in Rice Plants

2013 ◽  
Vol 82 (2) ◽  
pp. 156-166
Author(s):  
Tokihide Nagoshi ◽  
Shizue Uto ◽  
Ken-Ichi Matsushima ◽  
Shigeru Hirano ◽  
Fujio Tamai ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Flood Irrigation ◽  
Rice Plants

scholarly journals Straw and early nitrogen fertilization affect soil properties and upland rice yield

2016 ◽  
Vol 46 (3) ◽  
pp. 284-291 ◽  
Author(s):  
Adriano Stephan Nascente ◽  
Anna Cristina Lanna
Keyword(s):  
Microbial Biomass ◽  
Nitrate Reductase ◽  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Upland Rice ◽  
Microbial Biomass Carbon ◽  
Biomass Carbon ◽  
Early Application ◽  
Total N ◽  
Rice Plants

ABSTRACT The presence of cover crop straw and early application of total N at sowing may provide significant changes in the microbial population, reflecting on the N dynamics in the soil and in upland rice plants. This study aimed at determining the effect of the early application of nitrogen doses as mineral N and microbial biomass carbon in the soil, as well as in the activity of nitrate reductase, and grain yield of upland rice plants cultivated under no-tillage system (NTS). A randomized blocks design, in a split-plot scheme, with four replications, was used. The treatments consisted of N doses (0 kg ha-1, 40 kg ha-1, 80 kg ha-1 and 120 kg ha-1) and the presence or absence of U. brizantha cover straw. Maintaining the straw on the soil surface reduces the ammonium levels and increases the microbial biomass carbon content of the soil. The application of increasing doses of N in the soil provides increases in the levels of nitrate and ammonium in the soil up to 28 days after emergence. The activity of the nitrate reductase enzyme in the plants increases and the contents of ammonium and nitrate in the soil decrease with the crop development. The number of panicles and grain yield of upland rice increase with the increase of the nitrogen fertilization, but decrease in the presence of U. brizantha straw. Thus, it is recommend the use of early N fertilization in upland rice crop.

Effect of free-air atmospheric CO2 enrichment on dark respiration of rice plants (Oryza sativa L.)

2006 ◽  
Vol 115 (1-4) ◽  
pp. 105-112 ◽  
Author(s):  
Zhongjun Xu ◽  
Xunhua Zheng ◽  
Yuesi Wang ◽  
Yulong Wang ◽  
Yao Huang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Dark Respiration ◽  
Co2 Enrichment ◽  
Atmospheric Co2 ◽  
Rice Plants ◽  
Free Air

scholarly journals Physiological Responses to N-NO3 and N-NH4 of Triazine Resistant and Susceptible Plants of Horseweed (Erigeron canadensis L.)

2013 ◽  
Vol 46 (1) ◽  
pp. 5-14
Author(s):  
Ryszard Stanek
Keyword(s):  
Nitrogen Source ◽  
Nutrient Solution ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Dark Respiration ◽  
Physiological Responses ◽  
Controlled Conditions ◽  
Erigeron Canadensis ◽  
Horticultural Practice ◽  
Better Than

Triazine resistant and susceptible biotypes of horseweed (<i>Erigeron canadensis</i> L.) were grown under controlled conditions in nutrient solution with NH<sub>4</sub> or NO<sub>3</sub> ions as nitrogen source. Indicators such as: dry matter, CO<sub>2</sub> assimilation, chloroplasts activity, dark respiration and the content of K, Ca, Mg in the above ground parts displayed lower levels when plants were fed with NH<sub>4</sub> than with NO ions. Reduction of these indicators was stronger for the triazine susceptible plants which grew better than their resistant counterparts when fed with N-NO<sub>3</sub>. The triazine resistant plants grown with N-NH<sub>4</sub> contained more protein-N and K than the susceptible ones. Chloroplasts of the resistant plants were also less sensitive to NH<sub>4</sub>CL treatment. It is concluded that the resistant plants appear to be more tolerant to NH<sub>4</sub> ions as compared with their susceptible counterparts. For this reason application of ammonium forms of nitrogen fertilization in horticultural practice could favour spreading of triazine resistant horseweed.

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