scholarly journals A COMPARISON OF PASTURE RECOVERY FOLLOWING DIFFERENT GRAZING INTENSITIES WITH AND WITHOUT NITROGEN APPLICATION

1976 ◽  
pp. 259-259
Author(s):  
D.B. Meads
Keyword(s):  
Growth Period ◽  
Nitrogen Application ◽  
Grazing Intensities

Ryegrass-dominant pasture was differentially grazed in May 1975, and recovery of heavily and laxly defoliated swards compared over a 6-week growth period

Effects of Growth-period Type and Nitrogen Application Level on the RVA Profile Characteristics for Japonica Rice Genotypes

2013 ◽  
Vol 38 (2) ◽  
pp. 293-300 ◽  
Author(s):  
Min LI ◽  
Hong-Cheng ZHANG ◽  
Guo-Ye LI ◽  
Qun MA ◽  
Xiong YANG ◽  
...  
Keyword(s):  
Growth Period ◽  
Nitrogen Application ◽  
Rice Genotypes ◽  
Profile Characteristics

Production and survival of tillers of wheat and their contribution to yield

1974 ◽  
Vol 83 (1) ◽  
pp. 117-124 ◽  
Author(s):  
H. M. Ishag ◽  
M. B. Taha
Keyword(s):  
Grain Yield ◽  
Air Temperature ◽  
High Mortality ◽  
Growth Period ◽  
Dry Weight ◽  
Growing Season ◽  
Sowing Date ◽  
Wheat Cultivars ◽  
Nitrogen Application ◽  
True Leaf

SUMMARYThe effect of sowing date and nitrogen on tillering patterns, survival and contribution of reproductive tillers to grain yield of standard and Mexican wheat cultivars were studied for two seasons.Maximum number of tillers/plant, 3·2–4·5, was observed after 40 and 27 days from sowing for 1970–1 and 1971–2 respectively. The number of ears/plant was 1·4 at the end of the growing season. Varieties differed in tillering, and LRN10 and Giza 155 produced more reproductive tillers than Falchetto and Mexipak. Nitrogen application increased tillering efficiency, i.e. ratio of fertile to total tillers produced. Only 26% of tillers appearing in the axil of the first true leaf (T1) and 10% of tillers in the axil of the second true leaf (T2) survived to produce ears. The high mortality of tillers was attributed to high air temperature prevailing during the growth period (33 °C by day; 18 °C by night). Eared tillers did not die and were self supporting because of the photosynthesis by the ear.Grain weight/tiller was positively correlated with tiller dry weight at heading, r= 0·76–0·96. Main shoots contributed about 81% of the total grain yield and 19% came from T1 and T2 tillers.

scholarly journals Effects of Nitrogen Application on the Growth and Yield of Quinoa under Saline Conditions in Northern Vietnam

2021 ◽  
Vol 4 (1) ◽  
pp. 903-911
Author(s):  
Dinh Thai Hoang ◽  
Dang Thi Phuong Anh ◽  
Luu Hue Nhan ◽  
Nguyen Viet Long
Keyword(s):  
Yield Components ◽  
Growth Parameters ◽  
Growth Period ◽  
Application Rate ◽  
Growth And Yield ◽  
Soil Conditions ◽  
Saline Stress ◽  
Nitrogen Application ◽  
Growth Duration ◽  
Two Factors

This study aimed to determine the optimum nitrogen application rate for quinoa in saline soils. Two experiments were conducted: (i) the first experiment was under artificial saline conditions with the two factors of saline regime (stressed and non-stressed) and nitrogen application level (0, 30, 60, 90 and 150 kg N ha-1) in net-houses located in Gia Lam, Hanoi; and (ii) the second experiment was under natural field saline conditions with the two factors of quinoa cultivar (Atlas and Moradas) and nitrogen application level (0, 30, 60, 90, and 150 kg N ha-1) in the coastal areas of Hai Hau, Nam Dinh province. Data were collected for growth duration, insect and disease infestations during the growth period, and various growth parameters and yield components at harvest. The results showed that saline stress reduced the growth and yield parameters, but did not affect the quinoa growth duration of the investigated quinoa cultivars. In both experiments, the growth parameters and yield components increased according to the increase of the nitrogen application rates from 0 to 90 kg N ha-1, then decreased when the nitrogen rates were higher. The results suggested that 90 kg N ha-1 was the optimum nitrogen application dose for quinoa growth and development under saline soil conditions.

scholarly journals Pengaruh Hormon Asam Indol Asetat yang Dihasilkan Azospirillum sp. terhadap Perkembangan Akar Padi

2016 ◽  
Vol 3 (2) ◽  
pp. 66 ◽  
Author(s):  
Puji Lestari ◽  
Dwi N. Susilowati ◽  
Eny I. Riyanti
Keyword(s):  
Root Growth ◽  
Plant Height ◽  
Root Development ◽  
Close Association ◽  
Rice Variety ◽  
Growth Period ◽  
Nitrogen Application ◽  
Rice Culture ◽  
Iaa Production

<p>Free-living bacteria of the<br />genus Azospirillum live in close association with rice roots.<br />This bacteria produced indole acetic acid (IAA), a plant<br />growth hormon, to the environment. IAA was isolated from<br />cultures of Azospirillum strains and investigated for its effect<br />on root development and plant height of rice variety IR64 in<br />vitro. Rice cultures of variety IR64 were grown in vitro and<br />inoculated with cultures of Azospirilllum. Production of IAA<br />by the bacterium during its growth period in rice culture medium<br />containing different levels of nitrogen was observed.<br />Results of the experiment showed that strains Azospirillum<br />Az15 and Az44 had a high ability to produce IAA, i.e., 57.93<br />μg/ml at 12 days after incubation (DAI) and 40.42 μg/ml at 7<br />DAI, respectively. The IAA production pattern of Azospirillum<br />Az15 and Az44 in the liquid medium were fluctuative<br />until the end of the incubation period, while that of the strain<br />Az7 was linier. Strain Az7 gave a better effect on the root<br />development and plant height than strains Az15 and Az44.<br />Treatment combination of strain Az7 and 100% nitrogen gave<br />highest root development. High level of nitrogen increased<br />IAA content in the uninoculated culture, while low IAA<br />content on the inoculated one. Inoculation the culture with<br />strain Az7 together with 50% nitrogen application resulted in<br />the IAA content, root dry weight, root length, fiber root number,<br />and plant height as high as those on cultures containing<br />100% nitrogen (1 mM NH4NO3) without inoculation. Inoculation<br />of rice culture with Azospirillum is expected to reduce<br />nitrogen application on rice IR64 by the IAA production as<br />indicated by significant changes in the root growth and<br />development. A higher concentrations of IAA tend to give<br />better effects on the root growth and development of rice<br />IR64.</p>

Light relationships in grass-clover swards

1962 ◽  
Vol 13 (4) ◽  
pp. 599 ◽  
Author(s):  
WR Stern ◽  
CM Donald
Keyword(s):  
Growth Period ◽  
Botanical Composition ◽  
Nitrogen Application ◽  
Low Light ◽  
Area Index ◽  
Light Density ◽  
Four Levels ◽  
Grass Growth ◽  
Reduced Light ◽  
Leaf Canopy

Grass-clover swards were grown at four levels of nitrogen to provide a range from extreme clover dominance to extreme grass dominance. Yield, botanical composition, leaf area index, and light density were measured at 3.5 cm vertical intervals in each of the mixed swards throughout the growth period. It was directly demonstrated that the growth of clover in these mixed swards was governed by a series of relationships, namely: (a) Increasing rates of nitrogen application gave increased yields of grass (positive). (b) Increased yields of grass gave higher leaf areas of grass disposed above the clover leaf canopy (positive). (c) Higher leaf areas of grass above the clover reduced the light density at the clover leaf canopy (negative). (d) Reduced light density at the clover leaf canopy caused a reduced growth of the clover (positive). Under conditions of heavy grass growth and of consequent low light density at the clover canopy, the growth of clover not only became slow but eventually was strongly negative, leading to a marked reduction in both the number of clover plants and the yield of clover.

Winter wheat reaction to soil fertilization and foliar nitrogen application

2008 ◽  
Vol 63 (4) ◽  
Author(s):  
Jan Buczek ◽  
Barbara Kryńska ◽  
Renata Tobiasz-Salach
Keyword(s):  
Winter Wheat ◽  
Nitrogen Application ◽  
Soil Fertilization ◽  
Foliar Nitrogen

Konsep Orang Tua Yang Durhaka Dalam Perspektif Islam

AKADEMIKA ◽  
2017 ◽  
Vol 11 (1) ◽  
pp. 116-124
Author(s):  
Siti Suwaibatul Aslamiyah
Keyword(s):  
Family Environment ◽  
Social Life ◽  
Adult Life ◽  
Growth Period ◽  
Early Age ◽  
Family Roles ◽  
Good Person ◽  
Elderly Parents ◽  
The Family ◽  
Expectant Mothers

Many are peeling many of wich explore the child’s ungodly behavior to parents, but few who explore the opposite phenomenon of the ungodly behavior of parents against their children. Children is a grace from God of Allah swt to his parents to be grateful, educated and fostered to be a good person, strong personality and ethical Islamic. While, the development of religion in children is largely determined by the education and their experience, especially during the pre-election period of expectant mothers and fathers and the first growth period from 0 to 12 years. For that, the author is moved to explore and examine (about) the concept of elderly parents in the perspective of Islam. This is the author thoroughly to know who exactly the child in his existence according to Islam? What is the rule and rule of education in family and family roles in children’s education? What are the preparations (actions) that are classified as the ungodly behavior of parens against the child? In this study shows there is an effect (impact) between the family environment (parents) on the formation of islamic character and ethics in children from an early age mainly from the factors of prospective fathers and prospective mothers so the authors get the correlation that the failure of good personality planting in early childhood will turn out to form a problematic person in his adulthood (his grow up). While the success of parents guiding their children will determine the formation of character and their morals so that the family environment conditions are crucial for the success of children in social life in their adult life later (after grow up).  In this study resulted in the conclusion that there are some things that make the parents become ungodly against their children and it has been conceptualized in the holy book of the Qur’an which at least in this study collected there are 14 components of eldery behavior of the lawless to their children.

DYNAMICS OF BARLEY FLAVONOID AND PRODUCTIVITY UNDER UF-A RADIATION

1970 ◽  
pp. 14-18
Author(s):  
L. I. Goncharova ◽  
P. N. Tsygvintsev ◽  
О. А. Guseva
Keyword(s):  
Grain Yield ◽  
Defense Mechanisms ◽  
Antioxidant Defense ◽  
Malonic Dialdehyde ◽  
Growth Period ◽  
Negative Effects ◽  
Uv Spectrum ◽  
Quantum Energy ◽  
Dry Soil ◽  
Universal Mechanism

The effect of increased UV-A radiation during the ontogeny of barley plants of the Vladimir variety in the vegetation experiment was studied. Changes in the content of malonic dialdehyde, flavonoids and grain yield were revealed. UV-A radiation as compared to UV-B radiation, has lower quantum energy and can have both positive and negative effects on plant regulatory and photosynthetic processes. One of the most damaging effects of increased levels of UV-A radiation is oxidative stress, which causes lipid peroxidation of biological membranes. The existence of a plant cell in such conditions is possible only thanks to a system of antioxidant defense mechanisms. The accumulation of phenolic compounds under the action of UV radiation is a universal mechanism of protection against photodamage, which was formed in the early stages of the evolution of photoautotrophic organisms. Flavonoids are localized in the epidermis of plant tissues and act as an internal filter. The content of flavonoids is determined by the genotype and due to ontogenetic patterns. Plants were grown in a greenhouse, in vessels containing 4.5 kg of air-dry soil. The repetition is threefold (3 vessels in each variant). Sowing density - 13 plants in each vessel. As a source of UV-A radiation used lamps Black Light BLUE company Philips. Plants were irradiated for 5 hours a day from 10 to 15 hours at 13, 25, 34, 43 and 52 stages of organogenesis. The magnitude of the daily biologically effective dose of UV-A radiation was 60.7 kJ / m2. The solar part of the UV spectrum in the vegetation experiment was absent in the greenhouse. The nature of changes in the content of flavonoids under the action of UV-A irradiation during the growing season of plants with the dynamics of the oxidative process has been established. The first maximum was observed during the vegetative growth period, the second - at the earing stage. The data obtained indicate that flavonoids have ontogenetic conditionality and perform photoprotective functions. The increase in their content under the action of UV-A radiation is accompanied by an increase in resistance to photodamage, which is confirmed by the formation of grain yield.

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