scholarly journals Effects of Timing of Supplemental Nitrogen Application on Lodging Resistance and Yield of Wheat(Triticum aestivum L.)

2021 ◽  
Vol 56 (1) ◽  
pp. 17-27
Author(s):  
Hiromi MATSUYAMA ◽  
Taiichiro OOKAWA
Keyword(s):  
Triticum Aestivum ◽  
Nitrogen Application ◽  
Lodging Resistance

Floret survival in wheat: significance of the time of floret initiation relative to terminal spikelet formation

1982 ◽  
Vol 98 (2) ◽  
pp. 257-268 ◽  
Author(s):  
E. E. Whingwiri ◽  
W. R. Stern
Keyword(s):  
Triticum Aestivum ◽  
Yield Components ◽  
Field Experiments ◽  
Treatment Time ◽  
Vascular System ◽  
Sowing Date ◽  
Nitrogen Application ◽  
Yield And Yield Components ◽  
Individual Grains ◽  
Initiation Period

SUMMARYWheat (Triticum aestivum L.) cv. Gamenya was grown in a Mediterranean type environment in two separate field experiments, to determine the effects of nitrogen application and date of seeding on floret survival. One treatment, intermediate in nitrogen level and sowing date, was common in both experiments. Rates and durations of spikelet initiation and durations of the floret initiation period were estimated. At maturity, yield and yield components were measured and occurrence of individual grains at each floret position on odd-numbered spikelets were recorded. The time of floret initiation relative to terminal spikelet formation and the subsequent occurrence of grain were examined.Florets developed first in spikelets 5-13 and last in spikelet 1. Added nitrogen hastened the initiation of florets but did not affect the number initiated; it also increased the numbers of grains per spikelet. In the last sowing date treatment, time to floret initiation decreased, but the sequence of floret initiation was unaffected.Numbers of florets and grains on tillers were less than on main shoots. Only about 28% of all florets initiated developed into grain.The main conclusion was that the florets which initiated before the terminal spikelet formed grain and those that initiated afterwards did not; we accordingly postulate that the vascular system between the rachis and the floret develops as the floret is initiated, but that after terminal spikelet formation, this is inhibited and further grains then fail to develop.

scholarly journals Nitrogen Split Application Can Improve the Stalk Lodging Resistance of Maize Planted at High Density

Agriculture ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 364 ◽  
Author(s):  
Qun Wang ◽  
Jun Xue ◽  
Guoqiang Zhang ◽  
Jianglu Chen ◽  
Ruizhi Xie ◽  
...  
Keyword(s):  
Grain Filling ◽  
Application Rate ◽  
Breaking Force ◽  
Nitrogen Application ◽  
Lodging Resistance ◽  
Total N ◽  
Basal Internode ◽  
Stalk Lodging ◽  
Grain Filling Stage ◽  
Nitrogen Application Rate

The decrease of maize stalk quality is an important reason for stalk lodging during the grain filling stage. In the present study, a maize cultivar was planted at densities of 7.5, 9.0, 10.5, 12.0, and 13.5 × 104 plants ha−1 and subjected to nitrogen application rates of 0, 270, 360, and 450 kg ha−1 (denoted as N0, N270, N360, and N450). The stalk breaking force, mechanical strength, carbohydrate content, and nitrogen content of basal internodes were determined to study the effects of nitrogen application rate on the stalk lodging resistance of maize under different planting densities with integrated watering and fertilization using drip irrigation. At densities of 7.5 to 10.5 × 104 plants ha−1, the stalk breaking force, rind penetration strength (RPS), and crushing strength (CS) of the basal internode decreased first and then increased with increasing nitrogen application rate, with the lowest values obtained for the N270 treatment. Meanwhile, at planting densities of 12.0 × 104 plants ha−1 and above, the stalk breaking force, RPS, and CS increased with increasing nitrogen application rate. The basal internode dry weight per unit length (DWUL) and total N content increased with increasing nitrogen application rate. The breaking force was significantly positively correlated with the DWUL and mechanical strength of the basal internode. The RPS showed a positive linear correlation with the contents of cellulose, lignin, and total N of the third internode. Under the split application of water and fertilizer, the maize stalk total dry matter and contents of cellulose, lignin, and total nitrogen increased with increasing nitrogen fertilization rate during the grain filling stage at high planting density, so the stalk lodging resistance improved.

Optimum rate of nitrogen application and seed rate for deteriorated wheat (Triticum aestivum L.)

2019 ◽  
Vol 42 (5) ◽  
pp. 517-528 ◽  
Author(s):  
Hedieh Mosanaei ◽  
Hossien AjamNorozi ◽  
Mohammad Reza Dadashi ◽  
Abolfazleh Faraji ◽  
Mohammad Pessarakli
Keyword(s):  
Triticum Aestivum ◽  
Triticum Aestivum L ◽  
Nitrogen Application ◽  
Seed Rate ◽  
Optimum Rate

Effects of Nitrogen Application Rate and Plant Density on Lodging Resistance in Winter Wheat

2013 ◽  
Vol 38 (1) ◽  
pp. 121-128 ◽  
Author(s):  
Cheng-Yu WANG ◽  
Xing-Long DAI ◽  
Yu-Hua SHI ◽  
Zhen-Lin WANG ◽  
Xiao-Guang CHEN ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Plant Density ◽  
Application Rate ◽  
Nitrogen Application ◽  
Lodging Resistance ◽  
Nitrogen Application Rate
Sign in / Sign up

Export Citation Format

Share Document