Effects of Nitrogen Amount on Yield and Nutrient Absorption of Cold Land Japonica Rice under the Condition of Straw Returning

2015 ◽  
Vol 737 ◽  
pp. 325-331
Author(s):  
Qi Wang ◽  
Shu Wang
Keyword(s):  
Rice Variety ◽  
Grain Filling ◽  
Nutrient Absorption ◽  
Maturity Stage ◽  
Japonica Rice ◽  
N Accumulation ◽  
Filling Stage ◽  
Grain Filling Stage ◽  
1000 Grain Weight ◽  
Heading Stage

Effects of nitrogen amount on yield and nutrient absorption of cold land japonica rice under the condition of straw returning were studied using cold land rice variety Dong Nong 428 as experimental material. The results showed as follows: yields and effective spikes increased first then reduced, and the highest yield and effective panicles per plant was 7983.33 kg·hm-2 and 17.7 per plant that was found in treatment with nitrogen amount was 133 kg/hm2; differences of plant N, P and K accumulation of each treatment in tillering stage were not obvious and showed single peak curve change in heading stage while took on obvious increasing trend in grain filling stage and maturity stage. The straw returning increased effective spikes while had no effects on yield, spike weight, total shriveled rate and 1000-grain weight; the straw returning also had no effects on N, P and K accumulation in tillering and heading stage while it inhibit N, P and K accumulation in grain filling stage, and it inhibited N accumulation while promoted P and K accumulation in maturity stage.

Nitrogen effect on amino acid composition in leaf and grain of japonica rice during grain filling stage

2015 ◽  
Vol 64 ◽  
pp. 29-33 ◽  
Author(s):  
Yanling Zhao ◽  
Min Xi ◽  
Xincheng Zhang ◽  
Zhaomiao Lin ◽  
Chengqiang Ding ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Grain Filling ◽  
Japonica Rice ◽  
Filling Stage ◽  
Nitrogen Effect ◽  
Grain Filling Stage

scholarly journals Chlorophyll Composition, Chlorophyll Fluorescence, and Grain Yield Change in esl Mutant Rice

2018 ◽  
Vol 19 (10) ◽  
pp. 2945 ◽  
Author(s):  
Weiwei Lin ◽  
Xiaodong Guo ◽  
Xinfeng Pan ◽  
Zhaowei Li
Keyword(s):  
Photosystem Ii ◽  
Reaction Center ◽  
Binding Protein ◽  
Grain Filling ◽  
Fluorescence Yield ◽  
Light Energy ◽  
Grain Weight ◽  
Filling Stage ◽  
Grain Filling Stage ◽  
1000 Grain Weight

To evaluate the effect of changes in chlorophyll (Chl) composition and fluorescence on final yield formation, early senescence leaf (esl) mutant rice and its wild-type cultivar were employed to investigate the genotype-dependent differences in Chl composition, Chl fluorescence, and yield characteristics during the grain-filling stage. However, the temporal expression patterns of key genes involved in the photosystem II (PSII) reaction center in the leaves of two rice genotypes were analyzed by quantitative real-time polymerase chain reaction (qRT-PCR). Results showed that the seed-setting rate, 1000-grain weight, and yield per plant remarkably decreased, and the increase in the 1000-grain weight during the grain-filling stage was retarded in esl mutant rice. Chl composition, maximal fluorescence yield (Fm), variable fluorescence (Fv), a maximal quantum yield of PSII photochemistry (Fv/Fm), and net photosynthetic rate (Pn) in esl mutant rice considerably decreased, thereby indicating the weakened abilities of light energy harvesting and transferring in senescent leaves. The esl mutant rice showed an increase in the minimal fluorescence yield (F0) and 1 − Fv/Fm and decreases in the expression levels of light-harvesting Chl a/b binding protein (Cab) and photosystem II binding protein A (PsbA), PsbB, PsbC, and PsbD encoding for the reaction center of the PSII complex during the grain-filling stage. These results indicated the PSII reaction centers were severely damaged in the mesophyll cells of senescent leaves, which resulted in the weakened harvesting quantum photon and transferring light energy to PSI and PSII for carbon dioxide assimilation, leading to enhanced heat dissipation of light energy and a decrease in Pn.

Application of Nitrogen Fertilizer at Heading Stage Improves Rice Quality under Elevated Temperature during Grain-Filling Stage

Crop Science ◽  
2017 ◽  
Vol 57 (4) ◽  
pp. 2183-2192 ◽  
Author(s):  
Zhi Dou ◽  
She Tang ◽  
Ganghua Li ◽  
Zhenghui Liu ◽  
Chengqiang Ding ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Nitrogen Fertilizer ◽  
Grain Filling ◽  
Rice Quality ◽  
Filling Stage ◽  
Grain Filling Stage ◽  
Heading Stage

Effect of Temperature during Grain Filling Stage on Endosperm Structure and Apperance Quality of Aromatic Rice

2012 ◽  
Vol 460 ◽  
pp. 286-289 ◽  
Author(s):  
Zhen Jiang Xu ◽  
Li Zhong Xiao ◽  
Hong Liu ◽  
Yong Hao Ren ◽  
Zhi Lin Li
Keyword(s):  
Grain Filling ◽  
Effect Of Temperature ◽  
Rice Grain ◽  
Aromatic Rice ◽  
Starch Granules ◽  
Filling Stage ◽  
Appearance Quality ◽  
Endosperm Structure ◽  
Grain Filling Stage

Based on the experiment of two inbred aromatic rice varieties and one hybrid aromatic rice line treated under four different temperatures( daymean temperature 21°C, 23°C, 26°C and 30°C respectively) during grain filling stage in phytotrons, the shape and arrangement of endosperm starch granules in rice grain transection were observed by scanning electron microscope and the related characteristics of rice grain qualities of chalky percent and chalkiness were analyzed at the same time. The results showed that under the lower temperature( daymean temperature21°C and 23°C), many large compound starch granules with clear angulars packed together regularly without significant natural gaps bewteen starch granules in the tansectional endosperm. However, with the increase of temperature, starch granules in the transectional endosperm were changed from regularly shaped and closely and orderly arranged to various shaped and chaoticly arranged with obvious natural gaps between starch granules, which was closely consistent with the poorer appearance quality under the higher temperature, which indicated that the endosperm structure is closely related with appearance quality of aromatic rice.

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