Prediction of the effects of soil water stress on grain yield and radiation use efficiency of rice (Oryza sativa L.) using a simulation model

SUMMARYSeed-oriented planting provides a manner to influence canopy structure. The purpose of this research was to improve maize light interception using seed-oriented planting to manipulate leaf azimuth across the row thereby minimizing leaf overlap. To achieve leaf azimuths oriented preferentially across the row, seeds were planted: (i) upright with caryopsis pointed down, parallel to the row (upright); and (ii) laying flat, embryo up, perpendicular to the row (flat). These treatments were compared to conventionally planted seeds with resulting random leaf azimuth distribution. Seed orientation effects were contrasted with three levels of plant population and two levels of hybrid specific canopy structures. Increased plant population resulted in greater light interception but yield tended to decrease as plant population increased. The planophile hybrid produced consistently greater yields than the erectophile hybrid. The difference between planophile and erectophile hybrids ranged from 283 to 903 kg ha−1. Overall, mean grain yield for upright and flat seed placement increased by 351 and 463 kg ha−1 compared to random seed placement. Greater cumulative intercepted photosynthetically active radiation (CIPAR) was found for oriented seeds rather than random-oriented seeds. At physiological maturity upright, flat and random-oriented seeds intercepted 555, 525 and 521 MJ m−2 of PAR, respectively. Maize yield responded positively to improved light interception and better radiation use efficiency. Under irrigated conditions, precision planting of maize increased yield by 9 to 14% compared to random-oriented seeds.

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Higher Radiation Use Efficiency Produces Greater Biomass Before Heading and Grain Yield in Super Hybrid Rice

Agronomy ◽

10.3390/agronomy10020209 ◽

2020 ◽

Vol 10 (2) ◽

pp. 209

Author(s):

Yonghui Pan ◽

Shuai Gao ◽

Kailiu Xie ◽

Zhifeng Lu ◽

Xusheng Meng ◽

...

Keyword(s):

Grain Yield ◽

Hybrid Rice ◽

Rice Cultivar ◽

Radiation Use Efficiency ◽

Above Ground Biomass ◽

Radiation Interception ◽

Super Hybrid Rice ◽

Use Efficiency ◽

Fertilizer Rates ◽

Radiation Use

To reveal the physiological mechanism underlying the yield advantage of super hybrid rice compared with inbred super rice, a super hybrid rice cultivar Yliangyou 3218 (YLY) and an inbred super rice cultivar Zhendao 11 (ZD) were field grown under five nitrogen (N) fertilizer rates in 2016 and 2017. The average grain yield of YLY across nitrogen fertilizer rates was 10.1 t ha−1 in 2016 and 9.7 t ha−1 in 2017, 29.6% and 21.3% higher than that of ZD in 2016 and 2017, respectively. YLY showed higher above-ground biomass accumulation, especially growth before heading, which was mainly due to its faster green leaf area index (GLAI) formation and greater maximum GLAI (GLAImax). The daily radiation interception (RIdaily) was 15.0% higher in YLY than ZD, but the accumulated radiation interception (RIacc) before heading showed little difference between them because ZD had a longer growth duration. The radiation use efficiency (RUE) of YLY before heading was 54.7% higher than that of ZD (YLY, 2.12 g MJ−1; ZD, 1.37 g MJ−1). Our result demonstrated that the yield advantage of YLY was due to its higher above-ground biomass before heading, which was mainly achieved by its improvement in RUE rather than radiation interception.

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Plant development and grain yield in spring and winter barley

The Journal of Agricultural Science ◽

10.1017/s0021859600041496 ◽

1984 ◽

Vol 102 (1) ◽

pp. 85-95 ◽

Cited By ~ 23

Author(s):

R. P. Ellis ◽

G. Russell

Keyword(s):

Water Stress ◽

Grain Yield ◽

Soil Water ◽

Plant Development ◽

Early Spring ◽

Winter Barley ◽

Considerable Reduction ◽

Rate Of Development ◽

Soil Water Stress

SummaryThe development of spring and winter barley sown in both the spring and autumn has been followed in two seasons. The rates of development were similar in both types for autumn sowings but the spring types developed faster in spring sowings. Differences in the rate of development were related to photoperiod and temperature although soil water stress modified variety response. Yields were higher from autumn and early spring sowings. Sowing in April resulted in a considerable reduction in yield. The significance of these results for barley breeders is discussed.

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Responses of Super Rice (Oryza sativa L.) to Different Planting Methods for Grain Yield and Nitrogen-Use Efficiency in the Single Cropping Season

PLoS ONE ◽

10.1371/journal.pone.0104950 ◽

2014 ◽

Vol 9 (8) ◽

pp. e104950 ◽

Cited By ~ 2

Author(s):

Song Chen ◽

Danying Wang ◽

Chunmei Xu ◽

Chenglin Ji ◽

Xiaoguo Zhang ◽

...

Keyword(s):

Oryza Sativa ◽

Grain Yield ◽

Nitrogen Use Efficiency ◽

Oryza Sativa L ◽

Nitrogen Use ◽

Planting Methods ◽

Cropping Season ◽

Use Efficiency

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Productivity and nutrient use efficiency of hybrid rice (Oryza sativa L.) in response to integrated use of organic and inorganic sources of nutrients

INTERNATIONAL JOURNAL OF AGRICULTURAL SCIENCES ◽

10.15740/has/ijas/17.2/390-403 ◽

2021 ◽

Vol 17 (2) ◽

pp. 390-403

Author(s):

Dinesh Pandey ◽

Anjum Ahmad ◽

J.K. Chauhan ◽

N. Pandey

Keyword(s):

Growth Rate ◽

Oryza Sativa ◽

Grain Yield ◽

Dry Matter ◽

Hybrid Rice ◽

Oryza Sativa L ◽

Nutrient Use Efficiency ◽

Inorganic Fertilizer ◽

Nutrient Use ◽

Use Efficiency

An experiment was carried out during the Kharif 2002 and 2003, to study the productivity and nutrient use efficiency of hybrid rice (Oryza sativa L.) in response to integrated use of organic and inorganic sources of nutrients at Research farm, IGAU, Raipur (CG). In all 12 treatments, comprising of different N, P and K levels and its conjunction with organic fertilizers were laid out in Randomized Block Design with 3 replications. The results revealed that application of inorganic fertilizer level of 150:80:60 kg NPK ha-1 significantly increased number of active leaf, leaf area, leaf area index and dry matter accumulation at later stages as compared to lower level of inorganic fertilizer. The conjunction of 100:60:40 kg NPK ha-1 along with PM or N blended with CDU found to be equally effective to that of inorganic fertilizer level of 150:80:60 kg NPK ha-1 for above growth parameters. The chlorophyll content during crop period under above level was the highest under said treatment. The highest crop growth rate was observed between 60-90 DAT followed by 90 DAT-harvest and 30-60 DAT, respectively. The per day accumulation of dry matter during 60-90 DAT period was almost three to four times of that accumulated during 30-60 DAT. Thereafter growth rate almost declined till maturity during both the years.The increased concentration of N at different growth stages and its uptake by plant helped in increasing the yield components and grain yield. The critical analysis of grain yield observations revealed that conjunction of lower levels of inorganic fertilizer (100:60:40 or 50:30:20 kg NPK ha-1) along with CDU or PM gave the saving of 50 kg N, 20 kg P and 20 kg K ha-1 for the cultivation of hybrid rice. Moreover, the higher buildup of available N and K has been also observed under said combination of organic and inorganic fertilizer treatments. The application of 150:80:60 kg NPK ha-1 along with PSB gave the highest buildup of available phosphorus. Inorganic level of 150:80:60 kg NPK ha-1 gave the highest production efficiency and productivity rating index, which was followed by application of inorganic fertilizer of 100:60:40 kg NPK ha-1 along with PM and blending of N with CDU, respectively. The application inorganic fertilizer of 50:30:20 kg NPK ha-1 + PM gave the highest nutrient efficiency during both the years. The highest input cost, net profit and per rupee investment was found under 150:80:60 kg NPK ha-1 followed by application of 100:60:40 kg NPK ha-1 along with PM.

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SEED-ORIENTED PLANTING IMRPROVES LIGHT INTERCEPTION, RADIATION USE EFFICIENCY AND GRAIN YIELD OF MAIZE (Zea mays L.) – CORRIGENDUM

Experimental Agriculture ◽

10.1017/s0014479716000533 ◽

2016 ◽

Vol 53 (2) ◽

pp. 226-226

Author(s):

GUILHERME M. TORRES ◽

ADRIAN KOLLER ◽

RANDY TAYLOR ◽

WILLIAM R. RAUN

Keyword(s):

Zea Mays ◽

Grain Yield ◽

Zea Mays L ◽

Light Interception ◽

Radiation Use Efficiency ◽

Use Efficiency ◽

Radiation Use

This article was published with an incorrect Title. The correct title should read:‘SEED-ORIENTED PLANTING IMPROVES LIGHT INTERCEPTION, RADIATION USE EFFICIENCY AND GRAIN YIELD OF MAIZE (Zea mays L.)’The original article has been rectified with the correct title and a footnote detailing the error has been inserted in the online PDF and HTML copies.

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Evaluation of light extinction coefficient, radiation use efficiency and grain yield of soybean genotypes

African Journal of Agricultural Research ◽

10.5897/ajar11.1646 ◽

2014 ◽

Vol 9 (2) ◽

pp. 222-229 ◽

Cited By ~ 3

Author(s):

Ebadi Ali ◽

Sajed Kamel ◽

Gharib-Eshghi Amir

Keyword(s):

Grain Yield ◽

Extinction Coefficient ◽

Radiation Use Efficiency ◽

Light Extinction ◽

Light Extinction Coefficient ◽

Soybean Genotypes ◽

Use Efficiency ◽

Radiation Use

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Biomass accumulation and radiation use efficiency of winter wheat under deficit irrigation regimes

Plant Soil and Environment ◽

10.17221/315-pse ◽

2009 ◽

Vol 55 (No. 2) ◽

pp. 85-91 ◽

Cited By ~ 15

Author(s):

Q. Li ◽

M. Liu ◽

J. Zhang ◽

B. Dong ◽

Q. Bai

Keyword(s):

Winter Wheat ◽

Grain Yield ◽

Deficit Irrigation ◽

Biomass Accumulation ◽

Growing Season ◽

Radiation Use Efficiency ◽

Area Index ◽

Irrigation Regimes ◽

Use Efficiency ◽

Radiation Use

To better understand the potential for improving biomass accumulation and radiation use efficiency (RUE) of winter wheat under deficit irrigation regimes, in 2006–2007 and 2007–2008, an experiment was conducted at the Luancheng Experimental Station of Chinese Academy of Science to study the effects of deficit irrigation regimes on the photosynthetic active radiation (PAR), biomass accumulation, grain yield, and RUE of winter wheat. In this experiment, field experiment involving winter wheat with 1, 2 and 3 irrigation applications at sowing, jointing, or heading stages was conducted, and total irrigation water was all controlled at 120 mm. The results indicate that irrigation 2 or 3 times could help to increase the PAR capture ratio in the later growing season of winter wheat; this result was mainly due to the changes in the vertical distributions of leaf area index (LAI) and a significant increase of the LAI at 0–20 cm above the ground surface (LSD, P < 0.05). Compared with irrigation only once during the growing season of winter wheat, irrigation 2 times significantly (LSD, P < 0.05) increased aboveground dry matter at maturity; irrigation at sowing and heading or jointing and heading stages significantly (LSD, P < 0.05) improved the grain yield, and irrigation at jointing and heading stages provided the highest RUE (0.56 g/mol). Combining the grain yield and RUE, it can be concluded that irrigation at jointing and heading stages has higher grain yield and RUE, which will offer a sound measurement for developing deficit irrigation regimes in North China.

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