Effects of Routine Handling on Maize Growth

1977 ◽  
Vol 4 (6) ◽  
pp. 857 ◽  
Author(s):  
MF Beardsell
Keyword(s):  
Zea Mays ◽  
Leaf Area ◽  
Zea Mays L ◽  
Dry Weight ◽  
Controlled Environment ◽  
Short Term ◽  
Total Leaf Area ◽  
Reduced Height ◽  
Plant Characteristics ◽  
Routine Handling

Maize (Zea mays L. cv. XL45) plants were grown from seed in controlled-environment rooms. Twice-daily weighings of the plants and containers for 7 days reduced height, and removing plants from the rooms for two 20-min periods daily for 7 days gave significant reductions in stem and leaf dry weights and total leaf area. Transpiration rates were not affected by either of these treatments. Short-term removal from the rooms (up to 10 min daily) produced no significant reductions in plant characteristics. Measuring leaf lengths daily for 10 days resulted in significant reductions in stem dry weight and plant height. It is suggested that control plants should always be subjected to the same degree of handling as treated plants.

EFFECTS OF TEMPERATURE ON RATE AND DURATION OF KERNEL DRY MATTER ACCUMULATION OF MAIZE

1988 ◽  
Vol 68 (4) ◽  
pp. 935-940 ◽  
Author(s):  
M. TOLLENAAR ◽  
T. W. BRUULSEMA
Keyword(s):  
Growth Rate ◽  
Zea Mays ◽  
Dry Matter ◽  
Zea Mays L ◽  
Dry Weight ◽  
Controlled Environment ◽  
Dry Matter Accumulation ◽  
Linear Kernel ◽  
Effects Of Temperature ◽  
Kernel Growth

The response of rate and duration of kernel dry matter accumulation to temperatures in the range 10–25 °C was studied for two maize (Zea mays L.) hybrids grown under controlled-environment conditions. Kernel growth rates during the period of linear kernel growth increased linearly with temperature (b = 0.3 mg kernel−1 d−1 °C−1). Kernel dry weight at physiological maturity varied little among temperature treatments because the increase in kernel growth rate with increase in temperature was associated with a decline in the duration of kernel growth proportional to the increase in kernel growth rate.Key words: Zea mays L, period of linear kernel dry matter accumulation, controlled-environment conditions, kernel growth rate

scholarly journals The Critical Period of Corn Crops (Zea Mays L.) Due to Weed Competition on Various Soil Processing Systems

2018 ◽  
Vol 6 (03) ◽  
Author(s):  
Warlinson Girsang ◽  
Eko Wibowo
Keyword(s):  
Zea Mays ◽  
Leaf Area ◽  
Plant Height ◽  
Seed Weight ◽  
Critical Period ◽  
Zea Mays L ◽  
Processing System ◽  
Dry Weight ◽  
Weed Competition ◽  
Root Dry Weight

The research was conducted in October 2016 - February 2017 at Huta Sait Buttu Saribu, Pematang Sidamanik sub-district of Simalungun district, altitude of place + 1100 m asl. The purpose of this research is to understand the critical period of corn crops (Zea mays L.) due to weed competition in various soil systems. The research implementation methodology used a split plot design (SPD) with randomized block experimental design. The treatment consists of two factors, namely the land treatment system (T) as the main plot and the weed investment period (W) as the subplot. The soil processing system consists of 3 types, i.e. without soil treatment (T0), minimum tillage (T1), and intensive tillage (T2). While the investment period of weeds is designed in 10 treatments, namely W1 = free weed for 0-15 DAP, W2 = free weed for 0-30 DAP, W3 = free weed 0-45 DAP, W4 = free weed 0-60 DAP, W5 = free weed until harvest, W6 = weeds from planting to harvest, W7 = weeds for 0-60 DAP, W8 = weeds for 0-45 DAP, W9 = weeds for 0-30 DAP, and W10 = weeds for 0-15 DAP. Each treatment was repeated 3 times. To determine the effect of the two treatments, observation towards the dominance of weeds (summed dominance ratio), the period of silk delay (day), height of plant (cm), root dry weight (g), leaf area (cm2), and dry seed production per plot (kg) is done. From the result of research data analysis, noted that soil processing system is influencing the root dry weight, plant height, total leaf area and seed production per plot, but the period of silk delay is not influenced by difference of soil processing system. The difference in weed investment time affects the period of silk delay, plant height, root dry weight, leaf area and seed weight per plot. The interaction of both treatments affects plant height, root dry weight, leaf area, and seed weight per plot. But period of silk delay is not influenced by the interaction of the two treatments. From the research results, concluded that the critical period of corn crop growth due to weed competition occurs when in the period of 0-60 DAP weeds are allowed to compete with corn crops

scholarly journals IMPORTANCE OF KINETIN FOR SOME GROWTH CHARACTERS OF Zea mays L. UNDER WATER STRESS CONDITION

2016 ◽  
Vol 47 (1) ◽  
Author(s):  
Mohammed & Ahmed
Keyword(s):  
Growth Rate ◽  
Zea Mays ◽  
Water Stress ◽  
Leaf Area ◽  
Plant Height ◽  
Stress Condition ◽  
Zea Mays L ◽  
Dry Weight ◽  
Available Water ◽  
Water Stress Condition

A field experiment was conducted during two seasons Spring and Autums 2014 at the expermeatal field of Field crop Department, College of Agriculture, University of Baghdad to study the importance of Kinetin for some traits of Zea mays L. under water stress condition , by using randomized complete Block Design in the arrangement of a split-plot with three replications . Skipping irrigation elongation T2, emergence of aers T3, 10% flowering feminization T4, milk stage T5, and dough stage T6 . All these treatments were irrigated when 85% of the available water was depleted with control treatment T1 which was irrigated when 50% of the available water was depleted , were assigned as a main plots while the Kinetin spray in the six and ten leaves stages K1,K2 in addition to without spray K0 treatment were assigned as a sub-plots. The results showed that Skipping irrigation at Elongation,  and 10% flowering feminization led to lower average plant height, leaf area , leaf area indx , Dry matter yield , growth rate and the dry weight of the root. The plant spray with Kinetin at ten leaves stage gave the highest average  of  plant height(160.8 , 157.09 cm) , leaf  area (5783 , 5872 cm2) , leaf area index (4.13 , 4.19 ) , plant dry weight (186.26 , 196.05  gm.plant-1) , crop growth rate (16.83 , 20.89  (gm.m2)-1.day-1) and root dry weight (26.14 , 26.77 gm.plant-1)  for both season respectively . Therefor we recomned the necessity to irrigate in the following stages Elongation, emergence of Areanas,  and specialy 10% flowering feminization , in addition to possibility of spray Zea mays plant with kinetin to improre tolerate of water stress.

The influence of seed size and depth of sowing on pre-emergence and early vegetative growth of subterranean clover (Trifolium subterraneum L.)

1956 ◽  
Vol 7 (2) ◽  
pp. 98 ◽  
Author(s):  
JN Black
Keyword(s):  
Leaf Area ◽  
Seed Size ◽  
Vegetative Growth ◽  
Dry Matter ◽  
Relative Rate ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Dry Weight ◽  
Total Leaf Area ◽  
Pot Culture

Changes in the pre-emergence distribution of dry matter in subterranean clover (Trifolium subterraneum L.) variety Bacchus Marsh were followed at 21°C, using three sizes of seed and three depths of sowing, ½, 1¼, and 2 in. Decreasing seed size and increasing depth of sowing both reduce the weight of the cotyledons a t emergence. Seed of the three sizes were sown a t three depths in pot culture a t staggered intervals so that emergence was simultaneous. Dry weight in the early vegetative stage was proportional to seed size, and total leaf area and leaf numbers showed similar trends. Plants of each seed size grew at the same relative rate. No effect of depth of sowing could be detected, and this was shown to be due to the cotyledon area a t emergence being constant for any given seed size, regardless of varying depth of sowing and hence of cotyledon weight. It was concluded that seed size in a plant having epigeal germination and without endosperm is of importance: firstly, in limiting the maximum hypocotyl elongation and hence depth of sowing, and secondly, in determining cotyledon area. Cotyledon area in turn influences seedling growth, which is not affected by cotyledon weight. Once emergence has taken place, cotyledonary reserves are of no further significance in the growth of the plants.

Alfalfa plant-derived biostimulant stimulate short-term growth of salt stressed Zea mays L. plants

2012 ◽  
Vol 364 (1-2) ◽  
pp. 145-158 ◽  
Author(s):  
Andrea Ertani ◽  
Michela Schiavon ◽  
Adele Muscolo ◽  
Serenella Nardi
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Short Term ◽  
Alfalfa Plant

scholarly journals Short-term Recurring Drought Affects Growth and Photosynthetic Capacity of Four Conifer Species

2013 ◽  
Vol 31 (1) ◽  
pp. 39-42
Author(s):  
Joshua R. Pool ◽  
Jason J. Griffin ◽  
Cheryl R. Boyer ◽  
Stuart L. Warren
Keyword(s):  
Root Growth ◽  
Great Plains ◽  
Growth Index ◽  
Dry Weight ◽  
Detectable Effect ◽  
Severe Drought ◽  
Short Term ◽  
Southern Great Plains ◽  
Reduced Height ◽  
Tree Survival

The Midwest and southern Great Plains are known for historic and severe droughts. More common, however, are short-term recurring drought events that can limit tree survival. The pressure of environmental stress combined with numerous diseases and pests are decimating existing Pinus L. spp. (pine) plantings and driving the effort to identify alternative species. Four species of conifer were subjected to recurring moderate or severe drought to observe the effects on growth and photosynthesis. Species evaluated were: Abies nordmanniana (Nordmann fir), Cupressus arizonica (Arizona cypress), Picea engelmannii (Engelmann spruce), and Thuja × ‘Green Giant’ (‘Green Giant’ arborvitae). Recurring drought reduced height and growth index of T. × ‘Green Giant’. However, photosynthesis and root growth were unaffected by drought treatments. In contrast, reduced Pnet was the only detectable effect of recurring drought in P. engelmannii. Growth of A. nordmanniana was not affected by drought. When subjected to drought, C. arizonica reduced shoot dry weight, while maintaining photosynthesis and root growth. Overall, C. arizonica was able to maintain growth of roots and shoots as well as maintain photosynthesis which may be an advantage in the harsh climate of the Midwest and southern Great Plains.

scholarly journals Effect of salt stress on some sweet corn (Zea mays L. var. saccharata) genotypes

2015 ◽  
Vol 67 (3) ◽  
pp. 993-1000 ◽  
Author(s):  
Lydia Shtereva ◽  
Roumiana Vassilevska-Ivanova ◽  
Tanya Karceva
Keyword(s):  
Zea Mays ◽  
Salt Stress ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Growth Parameters ◽  
Dry Weight ◽  
Germination Percentage ◽  
F1 Hybrid ◽  
Salt Stress Condition ◽  
Salinity Levels

An experiment was carried out hydroponically under laboratory conditions to investigate the effect of salt stress on several physiological and biochemical parameters of three sweet corn (Zea mays L. var. saccharata) genotypes: lines 6-13, C-6 (pollen source) and their heterotic F1 hybrid ?Zaharina?. The degree of salinity tolerance among these genotypes was evaluated at three different sodium chloride (NaCl) concentrations: 0 mM, 100 mM, 125 mM and 150 mM. Seed germination, plant growth and biochemical stress determining parameters such as malondialdehyde (MDA), proline content and hydrogen peroxide (H2O2) levels were compared between seedlings of lines and hybrid. The obtained results indicated that both lines and hybrid have similar responses at different salinity levels for all examined traits. All the seedlings? growth parameters, such as germination percentage, root length, shoot length, root and shoot fresh and dry weight, decreased with increasing salinity level. MDA, proline and H2O2 increased at different saline conditions in comparison to the control. Based on the results, of the three genotypes examined, the hybrid Zaharina, followed by line C-6, was more salt-sensitive than line 6-13 in salt stress condition.

MEASUREMENT OF EVAPORATION FROM SOIL BENEATH CROP CANOPIES

1983 ◽  
Vol 63 (1) ◽  
pp. 137-141 ◽  
Author(s):  
G. K. WALKER
Keyword(s):  
Zea Mays ◽  
Key Words ◽  
Leaf Area ◽  
Energy Supply ◽  
Zea Mays L ◽  
Growing Season ◽  
Soil Core ◽  
Crop Cover ◽  
Intact Soil Core ◽  
Intact Soil

Evaporation rates beneath maize canopies were measured using an intact soil core technique. Early in the growing season evaporation rates were periodically high (4.0 mm∙day−1) following rain, but declined rapidly. At full crop cover, when energy supply normally limits evaporation, significant differences in evaporation were detected between canopies with leaf area indices of 3.0 and 4.0. Key words: Evaporation measurement, energy supply, Zea mays L., leaf area, soil evaporimeter, lysimeter

Effects of Soil-Applied Materials on the Dry Weight and Boron Uptake of Maize Shoots (Zea Mays L.) Under High Boron Conditions

2019 ◽  
Vol 50 (7) ◽  
pp. 811-826 ◽  
Author(s):  
Hakan Çelik ◽  
Murat Ali Turan ◽  
Barış Bülent Aşık ◽  
Sencer Öztüfekçi ◽  
Ali Vahap Katkat
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Dry Weight ◽  
Boron Uptake ◽  
High Boron
Sign in / Sign up

Export Citation Format

Share Document