Influence of Propagule Weights and Nitrogen Fertilizer Rates on Growth and Yield of Pineapple (Ananas comosus (L.) Merr)

2007 ◽  
Vol 1 (3) ◽  
pp. 131-136 ◽  
Author(s):  
S.O. Omotoso ◽  
E.A. Akinrinde
Keyword(s):  
Nitrogen Fertilizer ◽  
Growth And Yield ◽  
Ananas Comosus ◽  
Fertilizer Rates

scholarly journals Response of Cowpea (Vigna unguiculata L. Walp) to Time of Application and Nitrogen Fertilizer on the Degraded Soil of Southern Guinea Savanna Zone of Nigeria

2020 ◽  
pp. 36-42
Author(s):  
E. Ndor ◽  
U. D. Faringoro
Keyword(s):  
Nitrogen Fertilizer ◽  
Seed Weight ◽  
Root Nodules ◽  
Block Design ◽  
Field Trials ◽  
Fertilizer Application ◽  
Growth And Yield ◽  
Time Of Application ◽  
Significant Difference ◽  
Fertilizer Rates

Field trials were conducted during 2017 and 2018 rainy season, to investigate the effect of nitrogen fertilizer rates and time of application on the growth and yield of cowpea. The treatment consisted of three levels of urea: 0, 40, 80 kg N ha-1 and the times of fertilizer application: during planting of cowpea, 2 weeks after planting, 4 weeks after planting and 6 weeks after planting; which were factorially combined to form twelve treatments and laid in Randomized Complete Block Design (RCBD). The results showed that, Nitrogen fertilizer rates and time of application had a significant increased on all the growth and yield parameters of cowpea in both years of trials. Application of 80 kg N ha-1 produced the highest number of cowpea leaves (134.45 and 139.23), number of branches (9.45 and 10.54), vine length (78.23cm and 80.12cm) and highest seed weight of 0.52 t ha-1 in both 2017 and 2018 trials. However, the control plots produced plants with the highest number of root nodules (14.78 and 12.49) in both years of cropping. Also, application of nitrogen fertilizer at two weeks after planting of cowpea produced the highest growth and seed weight of 0.68 t ha-1 in 2017 cropping; while in 2018 trial, application of nitrogen fertilizer at two weeks after cowpea planting produced seed yield of 0.69tha-1 which is statistically similar with application of nitrogen fertilizer on the fourth week after planting which produced 0.55 t ha-1 of cowpea seeds. The interaction between nitrogen fertilizer application rates and time of application did not showed any significant difference in cowpea yield and yield components in both years of cropping.

scholarly journals Effect of Gluconacetobacter diazotrophicus inoculation and reduced nitrogen fertilizer on yield and growth parameters of rice varieties

2021 ◽  
Vol 43 ◽  
Author(s):  
Tran Van Dung ◽  
Do Ba Tan ◽  
Tran Huynh Khanh ◽  
David Gale ◽  
Vu Van Long
Keyword(s):  
Nitrogen Fertilizer ◽  
Growth Parameters ◽  
Mekong Delta ◽  
N Fertilizer ◽  
Growth And Yield ◽  
Future Research ◽  
Rice Seed ◽  
Gluconacetobacter Diazotrophicus ◽  
Rice Varieties ◽  
Fertilizer Rates

Abstract: This study aimed to investigate effects of nitrogen (N) fertilizer rates and inoculation of rice seeds with N-fixing bacterium Gluconacetobacter diazotrophicus on the growth parameters and yield of OM5451 and OM6976 rice varieties in the Vietnamese Mekong Delta region. Nitrogen fertilizer rates of 50 kg N.ha-1 and 100 kg N.ha-1 were used, with latter reflecting farmer practice. Three rice seed inoculation methods were also employed: Seeds soaked in water for 24 hours and allowed to stand for 30 hours (control) (B0); Seeds soaked in water for 24 hours and inoculated with G. diazotrophicus for 30 hours (B1); Seeds soaked with G. diazotrophicus in water for 24 hours and allowed to stand for 30 hours. Applying 50 kg N.ha-1 without combining with NFB bacterium in this experiment generally resulted in less tillers, shorter plants, a lower SPAD index, and lower grain yield. Combining G. diazotrophicus bacterium with reduced N fertilizer of 50 kg N.ha-1 demonstrated rice growth and yield may be maintained in both varieties compared to 100 kg N.ha-1. These results providing a firm foundation for future research of adding NFB to paddy soils to decrease the N fertilizer requirement.

scholarly journals Impacts of Slow-Release Nitrogen Fertilizer Rates on the Morpho-Physiological Traits, Yield, and Nitrogen Use Efficiency of Rice under Different Water Regimes

Agriculture ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 86
Author(s):  
Alaa AL Aasmi ◽  
Jiuhao Li ◽  
Yousef Alhaj Hamoud ◽  
Yubin Lan ◽  
Kelvin Edom Alordzinu ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Nitrogen Fertilizer ◽  
Slow Release ◽  
Rice Production ◽  
Growth And Yield ◽  
Specific Information ◽  
Nitrogen Use ◽  
Water Regimes ◽  
Use Efficiency ◽  
Fertilizer Rates

The efficient use of water and fertilizer is vital for optimizing plant growth and yield in rice production. To achieve sustainable rice production and resource management, the ways in which applied water and nitrogen affect the root and shoot morpho-physiology, as well as yield, must be understood. In this study, a pot experiment was conducted to investigate the effects of slow-release nitrogen fertilizer (sulfur-coated urea) application at three levels (light nitrogen (NL), medium nitrogen (NM), and heavy nitrogen (NH)) on the growth, yield, and nitrogen use efficiency (NUE) of rice grown under three water regimes (wetting and soil saturation (WSS), wetting and moderate drying (WMD) and wetting and severe drying (WSD)). The results revealed that differences in water regimes and fertilizer rates led to significant differences in the roots, shoots, yield, and NUE of rice. Increasing the N dosage by 5% enhanced the root and biomass production by 16% in comparison with that of the other groups. The NH×WSS treatment produced the greatest root length, weight, density, active absorption, and oxidation. However, the integration of WSS × NL generated the maximum value of nitrogen apparent recovery efficiency (63.1% to 67.6%) and the greatest value of nitrogen partial factor productivity (39.9 g g−1 to 41.13 g g−1). Transmission electron microscopy (TEM) images showed that plants grown under high and medium nitrogen fertilizer rates with WSS had improved leaf mesophyll structure with normal starch grains, clear cell walls, and well-developed chloroplasts with tidy and well-arranged thylakoids. These results show that TEM images are useful for characterizing the nitrogen and water status of leaves in the sub-micrometer range and providing specific information regarding the leaf microstructure. The findings of this study suggest that the application of NH×WSS can produce improvements in growth traits and increase rice yield; however, the NL×WSS treatment led to greater NUE, and the authors recommend its usage in rice agriculture.

Effect of Nitrogen Fertilizer and Spraying with Iron Growth and Yield for Corn Zea mays L.

2015 ◽  
Vol 28 (2) ◽  
pp. 56-66
Author(s):  
Kifah A. J. Al-Dogachi ◽  
Kadim K. Al-Asady ◽  
Manal A. Askar
Keyword(s):  
Zea Mays ◽  
Nitrogen Fertilizer ◽  
Zea Mays L ◽  
Growth And Yield

EFFECT OF IRRIGATION INTERVALS AND NITROGEN FERTILIZER RATES ON FLAX YIELD AND SOME ANATOMICAL MANIFESTATIONS

2018 ◽  
Vol 3 (1) ◽  
pp. 1-19
Author(s):  
E. M. M. El- Gedwy ◽  
G. Y. M. Hammam Hammam ◽  
S. A. H. Allam ◽  
S. H. A. Mostafa ◽  
Kh. S. S. EL- Shimy
Keyword(s):  
Nitrogen Fertilizer ◽  
Fertilizer Rates
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