scholarly journals Faster leaf senescence after flowering in wet direct‐seeded rice was mainly regulated by decrease in cytokinin content as compared with transplanted‐flooded rice

2020 ◽  
Vol 9 (4) ◽  
Author(s):  
Hongyan Liu ◽  
Aibin He ◽  
Guanglei Jiang ◽  
Saddam Hussain ◽  
Weiqin Wang ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Cytokinin Content ◽  
Flooded Rice ◽  
Direct Seeded

Effect of the herbicide butachlor on methane emission and ebullition flux from a direct-seeded flooded rice field

2001 ◽  
Vol 33 (3) ◽  
pp. 175-180 ◽  
Author(s):  
S. R. Mohanty ◽  
K. Bharati ◽  
B. T. S. Moorthy ◽  
B. Ramakrishnan ◽  
V. R. Rao ◽  
...  
Keyword(s):  
Methane Emission ◽  
Rice Field ◽  
Flooded Rice ◽  
Direct Seeded ◽  
Flooded Rice Field

Chemical Weed Control in Direct-seeded Flooded Rice in Taiwan

1974 ◽  
Vol 20 (4) ◽  
pp. 425-428 ◽  
Author(s):  
W. L. Chang ◽  
S. K. De Datta
Keyword(s):  
Weed Control ◽  
Flooded Rice ◽  
Direct Seeded

Effect of late-season N fertilization on photosynthesis and yield of transplanted and direct-seeded tropical flooded rice. I. Growth dynamics

1992 ◽  
Vol 28 (3) ◽  
pp. 223-234 ◽  
Author(s):  
M. Dingkuhn ◽  
S.K. De Datta ◽  
C. Javellana ◽  
R. Pamplona ◽  
H.F. Schnier
Keyword(s):  
Growth Dynamics ◽  
N Fertilization ◽  
Late Season ◽  
Flooded Rice ◽  
Direct Seeded

Diurnal and Developmental Changes in Canopy Gas Exchange in Relation to Growth in Transplanted and Direct-Seeded Flooded Rice

1990 ◽  
Vol 17 (2) ◽  
pp. 119 ◽  
Author(s):  
M Dingkuhn ◽  
HF Schnier ◽  
SKD Datta ◽  
E Wijangco ◽  
K Dorffling
Keyword(s):  
Vapour Pressure Deficit ◽  
Co2 Assimilation ◽  
Tiller Number ◽  
Planting Density ◽  
Dry Matter Accumulation ◽  
Light Saturation ◽  
Area Index ◽  
Flooded Rice ◽  
Transplanted Rice ◽  
Direct Seeded

Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement. The canopy CO2 assimilation rates confirmed the plant dry matter accumulation observed. Diurnal measurements of net CO2 assimilation and night respiration indicated a mild midday/afternoon depression that depended on the atmospheric vapour pressure deficit (VPD). Light response of canopy CO2 assimilation exhibited light saturation at full daylight when LAI was lower than 1. No light saturation was observed at higher LAI. Transplanting shock in transplanted rice reduced net assimilation rates and delayed foliage expansion and tillering by 15 days. Crop development was retarded by 7 days. Uninhibited growth of direct-seeded rice during the vegetative stage led to superior biological yield and tiller number at maturity while grain yield was equal to that of transplanted rice. Potential yield increase in direct-seeded flooded rice is discussed on the basis of growth kinetics and assimilate source/sink relationships.

Some Factors Affecting Herbicide Selectivity in Upland Rice

Weed Science ◽  
1976 ◽  
Vol 24 (1) ◽  
pp. 63-67 ◽  
Author(s):  
D. Nangju ◽  
D. L. Plucknett ◽  
S. R. Obien
Keyword(s):  
Activated Carbon ◽  
Upland Rice ◽  
Rice Seed ◽  
Soil Leaching ◽  
Rice Seedlings ◽  
Factors Affecting ◽  
Degree Of Protection ◽  
Flooded Rice ◽  
Transplanted Rice ◽  
Direct Seeded

Several methods were used to overcome herbicide phytotoxicity to upland rice (Oryza sativaL., ‘IR8′). Seed pelleting with activated carbon and band application of activated carbon slurry over the rice seed were ineffective in reducing the toxicity of chloramben (3-amino-2,5-dichlorobenzoic acid) and atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] to upland rice. In contrast, a 2.5-cm layer of activated carbon and vermiculite mixture (1:1) placed over the rice seed was effective in overcoming the toxicity of these herbicides. Deep sowing (3.0 to 4.5 cm) of rice seed was adequate in protecting upland rice from herbicides which are toxic to direct seeded, flooded rice but are not toxic to transplanted rice. The degree of protection from deep sowing, however, was determined by site of uptake, herbicide adsorption by soil, leaching, and inherent toxicity of the herbicides to rice seedlings.

Effect of late-season N fertilization on photosynthesis and yield of transplanted and direct-seeded tropical flooded rice. II. A canopy stratification study

1992 ◽  
Vol 28 (3) ◽  
pp. 235-249 ◽  
Author(s):  
M. Dingkuhn ◽  
S.K. De Datta ◽  
R. Pamplona ◽  
C. Javellana ◽  
H.F. Schnier
Keyword(s):  
N Fertilization ◽  
Late Season ◽  
Flooded Rice ◽  
Direct Seeded

Sesbania brown manuring improves soil health, productivity, and profitability of post-rice bread wheat and chickpea

2021 ◽  
pp. 1-18
Author(s):  
Muhammad Farooq ◽  
Naqib Ullah ◽  
Faisal Nadeem ◽  
Ahmad Nawaz ◽  
Kadambot H. M. Siddique
Keyword(s):  
Soil Analysis ◽  
Cropping Systems ◽  
Soil Health ◽  
Conventional Tillage ◽  
Available Phosphorus ◽  
Zero Tillage ◽  
Flooded Rice ◽  
Continuous Rotation ◽  
Direct Seeded ◽  
Residue Retention

Summary Continuous rotation of rice with wheat in rice–wheat system has resulted in stagnant yields and reduced profit margins while deteriorating the soil health. Legume incorporation in existing rice–wheat rotations might be a viable option to improve soil health and productivity. We investigated the influence of puddled transplanted flooded rice and direct-seeded rice on weed dynamics, soil health, productivity, and profitability of post-rice wheat and chickpea grown under zero tillage and conventional tillage. The previous direct-seeded rice crop was either sown alone or intercropped with sesbania as brown manure. The experiment comprised different rice–wheat and rice–chickpea systems which had been in place for two years: with and without rice residue retention. The initial soil analysis indicated that the plots with sesbania brown manuring in direct-seeded rice had the lowest soil bulk density (17.2%) and highest soil porosity (19.3%). Zero tillage in wheat or chickpea in the plots previously cultivated with co-culture of sesbania and direct-seeded rice increased total soil organic carbon by 13–22% in both years. The plots with sesbania brown manuring in direct-seeded rice followed by zero till or conventional till wheat and the plots with direct-seeded rice followed by zero till wheat with rice residue retention recorded the greater concentrations of total nitrogen, available phosphorus, and exchangeable potassium. Zero tillage in wheat and chickpea in post-rice sesbania brown manuring plots produced 41% and 43% more grain yield than those in the puddled transplanted flooded rice with conventional tillage and had the highest profitability. Overall, the rice–chickpea systems had better soil health and profitability than rice–wheat cropping systems. In conclusion, direct-seeded rice intercropped with sesbania followed by wheat and chickpea under zero tillage suppressed weed flora and improved soil physical properties, nutrient availability, productivity, and profitability.

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