Relationship between length of growing period and yield of rice plants under a limited nitrogen supply

The effects various rates of nitrogen application on accumulation of dry matter and nitrogen in potato (Solanum tuberosum L.) were studied during a short growing period of 140180 days, at MTT Agrifood Research Finland in 20002001. The treatments were 0, 60 and 120 kg N ha-1 and the potato cultivars tested were Van Gogh and Nicola. Four successive harvests were made during the course of the experiment to monitor changes in the accumulation of dry matter and nitrogen over the season. Applications of nitrogen substantially increased haulm dry matter accumulation and to an even greater extent their nitrogen contents. The highest dry matter values were generally registered at 120 kg N ha-1. Dry matter and nitrogen content of haulms started to decline during the later part of season and most nitrogen was relocated to tubers. The results suggest that an application of only 60 kg N ha-1 was sufficient to promote rapid canopy development and there were only small reductions in dry matter and nitrogen accumulation until late in the season when the canopy started to senesce as nitrogen supply diminished. Tuber yield, plant dry matter and nitrogen accumulation at maturity were related to crop nitrogen supply. Although application of the high rate, 120 N kg ha-1, resulted in a significant increase in dry matter accumulation, this was not reflected in the profit because the higher nitrogen application reduced dry matter content of tubers by 2.6% in 2000 and by 1.1% in 2001 relative to the use of 60 kg N ha-1. Apparent fertilizer nitrogen recovery values on a whole plant basis ranged from 53 to 75%. The proportion of fertilizer recovered in tubers clearly declined with increase in nitrogen supply.;

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Effect of root nitrogen supply forms on attraction and repulsion of second-stage juveniles of Meloidogyne graminicola

Nematology ◽

10.1163/15685411-00002697 ◽

2013 ◽

Vol 15 (4) ◽

pp. 469-482 ◽

Cited By ~ 3

Author(s):

Jagadeesh Patil ◽

Stephen J. Powers ◽

Keith G. Davies ◽

Hari S. Gaur ◽

Anthony J. Miller

Keyword(s):

Calcium Nitrate ◽

Nitrogen Supply ◽

Nitrification Inhibitors ◽

Root Knot Nematode ◽

Nitrogen Fertiliser ◽

Meloidogyne Graminicola ◽

Rice Plants ◽

Second Stage ◽

Hydroponically Grown ◽

Root Nitrogen

Three experiments were conducted to compare the attraction and repulsion of second-stage juveniles (J2) of the root-knot nematode, Meloidogyne graminicola, to rice plants supplied with different forms of nitrogen. The rice plants were hydroponically grown in a full nutrient solution containing different concentrations (0.1 or 10.0 mM) of nitrate (NO3−) or forms of nitrogen supply (2.85 mM calcium nitrate (Ca(NO3)2), ammonium nitrate (NH4NO3) or ammonium chloride (NH4Cl)) for 2 weeks. Five rice plants were placed with their roots in one corner of a Perspex X or Y-chamber partly filled with agar and J2 were inoculated onto the chambers. The data show that J2 of M. graminicola were significantly attracted towards the roots of rice plants grown in hydroponics containing 0.1 mM NO3− and 2.85 mM Ca(NO3)2, but repelled by 10.0 mM NO3−, 2.85 mM NH4NO3 and NH4Cl. The results suggest that the application of ammonia-based nitrogen fertiliser to the rice nursery bed may interfere with nematode attraction and thus reduce invasion, and the application of chemical nitrification inhibitors to rice nursery beds may decrease nematode invasion.

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Control of Eleocharis Kuroguwai Ohwi and Cyperus serotinus Rottb. in the Growing Period of Rice Plants by 2, 4-D·ATA

Journal of Weed Science and Technology ◽

10.3719/weed.1971.30 ◽

1971 ◽

Vol 1971 (11) ◽

pp. 30-35

Author(s):

Nobuo NIHEI

Keyword(s):

Rice Plants ◽

Growing Period

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Aquaporin Expression and Water Transport Pathways inside Leaves Are Affected by Nitrogen Supply through Transpiration in Rice Plants

International Journal of Molecular Sciences ◽

10.3390/ijms19010256 ◽

2018 ◽

Vol 19 (1) ◽

pp. 256 ◽

Cited By ~ 8

Author(s):

Lei Ding ◽

Yingrui Li ◽

Limin Gao ◽

Zhifeng Lu ◽

Min Wang ◽

...

Keyword(s):

Water Transport ◽

Nitrogen Supply ◽

Transport Pathways ◽

Rice Plants

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Water absorption is affected by the nitrogen supply to rice plants

Plant and Soil ◽

10.1007/s11104-015-2603-5 ◽

2015 ◽

Vol 396 (1-2) ◽

pp. 397-410 ◽

Cited By ~ 27

Author(s):

Binbin Ren ◽

Min Wang ◽

Yupei Chen ◽

Guomei Sun ◽

Yong Li ◽

...

Keyword(s):

Water Absorption ◽

Nitrogen Supply ◽

Rice Plants

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Developmental differences in rice plants in relation to photoperiodism.

Netherlands Journal of Agricultural Science ◽

10.18174/njas.v1i3.17871 ◽

1953 ◽

Vol 1 (3) ◽

pp. 202-216

Author(s):

C. Coolhaas ◽

Th.M. Wormer

Keyword(s):

Subsequent Development ◽

Morphological Characters ◽

Developmental Differences ◽

Reproductive Stage ◽

Main Stem ◽

Axillary Buds ◽

Direct Influence ◽

Rice Plants ◽

Growing Period ◽

Stages Of Growth

Two varieties of rice sensitive to the length of photoperiod, Nero di Vialone and Kameji, and 2 insensitive varieties, Fortuna and Karang Serang, were subjected to daily photoperiods of 12 and 18 hr. applied either throughout the growing period or at various stages of the growing period. Earlier formation of panicles was induced by 12 hr. than by 18 hr. photoperiods in the case of Nero di Vialone and Kameji, but not in the case of Fortuna and Karang Serang. Where early flowering was induced by the use of 12 hr. photoperiods the panicles on the main stem were smaller than corresponding panicles on plants grown with 18 hr. photoperiods. The length of photoperiod had no direct influence on the growth of leaves. In the case of the sensitive variety Nero di Vialone, all tillers subjected to 12 hr. photoperiods from the beginning of growth entered the reproductive stage, after which a proportion of them ceased development, whereas a proportion of the tillers subjected to 18 hr. photoperiods from the beginning of growth ceased development before they had formed an inflorescence. A change from 12 hr. to 18 hr. photoperiods in sensitive varieties at the time of initiation of inflorescences caused a delay, and a change from 18 hr. to 12 hr. photoperiods, a hastening, of the subsequent development of flowers. The morphological characters of the axillary buds of rice plants at various stages of growth are described.-W.J.B. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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