Results 291 to 300 of about 2,493,212 (358)

EFFECT OF NITROGEN AVAILABILITY ON GROWTH AND NITROGEN UPTAKE IN LETTUCE

Acta Horticulturae, 2000
Fresh and dry matter production and nitrogen uptake during crop growth of two lettuce (Lactuca sativa L.) cultivars, cv. Audran (butterhead lettuce) and cv. Canasta (loose leaf lettuce), were studied in a field trial at different levels of fertilizer-N (0, 50, 100 and 200 kg N ha-1) broadcast at transplanting. On a dry matter basis, the relative growth
TEI, Francesco, BENINCASA, Paolo, GUIDUCCI, Marcello   +2 more
openaire   +2 more sources

Organic and inorganic nitrogen uptake in lichens

Planta, 2004
In order to learn more about nitrogen (N) acquisition in lichens, and to see whether different lichens differ in their affinity to various N sources, N uptake was measured in 14 various lichen associations ("species"). These species represented various morphologies (fruticose or foliose), contrasting microhabitat preferences (epiphytic or terricolous),
Lena, Dahlman, Jörgen, Persson, Kristin, Palmqvist, Torgny, Näsholm   +3 more
openaire   +2 more sources

Dissolved organic nitrogen uptake by seagrasses

Limnology and Oceanography, 2008
We examined the ability of seagrasses to take up dissolved organic nitrogen (DON) with leaves (in situ) and roots (laboratory) in an oligotrophic tropical offshore meadow in Indonesia using 15N‐labeled nitrogen (N) substrates. We compared the uptake of urea and amino acids with that of ammonium (NH4+) and nitrate (NO3−) and determined uptake kinetics ...
Vonk, J.A., Middelburg, J.J., Stapel, J., Bouma, T.J.   +3 more
openaire   +2 more sources

miR164-MhNAC1 regulates apple root nitrogen uptake under low nitrogen stress.

New Phytologist
Nitrogen is an essential nutrient for plant growth and serves as a signaling molecule to regulate gene expression inducing physiological, growth and developmental responses. An excess or deficiency of nitrogen may have adverse effects on plants. Studying
Xiaona Wang, Yan Zhou, Xiaofen Chai, Toshi M Foster, C. Deng, Ting Wu, Xinzhong Zhang, Zhenhai Han, Yi Wang   +8 more
semanticscholar   +1 more source

Effect on nitrogen and spacing on the yield of sugarcane and uptake of nitrogen

Madras Agricultural Journal, 2023
A field experiment was conducted at Sugarcane Breeding Institute, Coimbatore during 1993-94 to study the effect of graded levels of N application (0, 100, 200, 300 and 400 kg ha) under two different row spacings (75 and 90 cm) in three promising midlate varieties of sugarcane (Co 86027, Co 86032 and Co 86038) on the nitrogen uptake, cane yield and ...
ASOKAN S, MAHADEVSAWAMY M
openaire   +1 more source

Effects of irrigation regime and soil clay content and their interaction on the biological yield, nitrogen uptake and nitrogen-use efficiency of rice grown in southern China

Agricultural Water Management, 2019
Rice is commonly grown in clay soils under flooding or water-saving irrigation. The combination of irrigation regime and soil texture tend to create the distinguished growing environment of crops.
Y. A. Hamoud, Xiangping Guo, Zhenchang Wang, Hiba Shaghaleh, Sheng Chen, Alfadil Hassan, Ahmad Bakour   +6 more
semanticscholar   +1 more source

Nitrogen Uptake, Dissolved Organic Nitrogen Release, and New Production

Science, 1994
In oceanic, coastal, and estuarine environments, an average of 25 to 41 percent of the dissolved inorganic nitrogen (NH 4 + and NO 3 – ) taken up by phytoplankton is released as dissolved organic nitrogen (DON).
D A, Bronk, P M, Glibert, B B, Ward
openaire   +2 more sources

Melatonin promotes plant growth by increasing nitrogen uptake and assimilation under nitrogen deficient condition in winter wheat.

Plant physiology and biochemistry : PPB, 2019
Melatonin (MEL) has been widely reported to be beneficial to plant growth and development, but few studies have combined investigations of the performance and function of MEL with detailed physiologically based analyses of nitrogen (N) uptake and ...
Yujie Qiao, Lina Yin, Bomei Wang, Qingbo Ke, Xiping Deng, Shiwen Wang   +5 more
semanticscholar   +1 more source

Nitrogen uptake and translocation by Chara

Aquatic Botany, 2003
Abstract The potential for above-ground and below-ground uptake and subsequent internal translocation of ammonium (NH4+) and nitrate (NO3−) by the macroalga Chara spp. was investigated. In a two compartment experimental set-up separating above-ground and below-ground algal parts, the charophytes were exposed to various combinations of 15 N
Vermeer, C.P., Escher, M., Portielje, R., de Klein, J.J.M.   +3 more
openaire   +1 more source

Defining upper limits of nitrogen uptake and nitrogen use efficiency of potato in response to crop N supply

Field crops research (Print), 2019
Sound nitrogen management seeks to ensure crop yield, quality and profit, while avoiding over-fertilization lead to excess reactive nitrogen entering the agro- ecosystem or under-fertilization leading to mining of soil organic matter.
S. Milroy, Penghao Wang, V. Sadras
semanticscholar   +1 more source