أجري البحث في حقول مركز البحوث الزراعية في صنوبر جبلة خلال الموسمين الـزراعيين 2008
و 2009 بهدف تقييم تأثير الكثافة النباتية و التسميد الآزوتي في نمو الذرة الـصفراء (الهجـين باسـل2)
و إنتاجيته. استُعملت ثلاث كثافات هي : 70×20 سم أو 71428 نباتاً/هكتـار، 70×25 سـم أو 57142
نباتاً/هكتار، 70×30 سم أو 47619 نباتاً/هكتار. نفذت التجربة وفق تصميم القطع المنشقة لمرة واحدة،
حيث مثلت الكثافات بالقطع الرئيسة، و وضعت المعدلات السمادية في القطع الفرعية. أدت زيادة الكثافـة
النباتية إلى زيادة ارتفاع النبات و ارتفاع العرنوس العلوي، و تأخير الإزهار مع زيادة الفاصل الزمني بـين
موعدي الإزهار المذكر و المؤنث، و انخفاض مساحة ورقة العرنوس. لم تؤثر زيادة الكثافـة فـي عـدد
العرانيس على النبات، غير أنها أدت إلى انخفاض طول العرنوس و وزن الـ1000 حبة.
Objective of this work was to investigate how plant density and nitrogen
rate affects the growth , yield and its components in maize (Bassel 2 hybrid).
The experiment was carried out, at the agricultural research centre in Snoubar
Jableh, during the 2008 and 2009 seasons, included 12 treatments which were
the combination three plant population densities 71428/ha, 57142/ha, and
47619/ha and four N rates (0, 60, 120 and 180 kg/ha). The experimental design
was a split-plot, with different densities as main plots, randomized in three
complete blocks, and the fertilization as subplots. The data were analyzed by
using “Mstat” statistical package. Increasing planting population density
delayed anthesis and silking date, increased the anthesis-silking interval, plant
height, ear height, grain yield, agronomic nitrogen efficiency and nitrogen use
efficiency, but decreased ear leaf area, chlorophyll content, 1000 seed weight,
number of grains/ear, shelling percentage (%), and grain protein content.
Nitrogen fertilizer decreased tassilling and silking date, and nitrogen use
efficiency, increasing plant and ear height, ear leaf area, chlorophyll content,
number of grains/ear, ear weight,1000-grains weight, Shelling percentage,
grain yield up to 120 kg N/ha, agronomic nitrogen efficiency and grain protein
content.
References used
Akman, Z., 2002. Effect of tiller removig and plant density on ear yield of sweet corn (Zea mays sacharata sturt). Pak. J. Biol. Sci., 5(9): 90
Al-Kaisi, M. and X. Yin. 2003. Effects of nitrogen rate, irrigation rate and plant population on corn yield and water use efficiency. Agron.J., 95: 1475-1482
Al-Kaisi, M. and D.Kwaw-Mensah, 2007. Effect of tillage and nitrogen rate on corn yield and nitrogen and phosphorus uptake in a corn-soybean rotation. Agron. J., 99: 1548-1558
The research was executed within the season 2016, in the west of
HOMS in the first settlement area.
The study has showed the effect of plant density and nitrogen
fertilization was studied on the growth and productivity of soybeans
Glycine max L . (Sb44).
It is well established that sugar content of sugar beet increases as the plant
reaches the biological maturity stage. This means that the sugar beet plant
must be left in the field to complete its growth. Farmers are usually concerned
with the hig
The study was carried out at Abo Jarash farm, Faculty of Agriculture,
Damascus University, during the growing season of 2012, where the maize
cultivar "Gouta 1" was grown in three agricultural spacings (20, 30 and 40 cm
between plants in the same
The research was executed within the season 2015 ,in the west
of HOMS in the first settlement area.One kind (Alfarancy) of
chick pea Cicer arietinum L, was sowed in January on three
planted distances (4,8,15) cm, and three application rates of
Ur
This study was carried out in the farm of the Faculty of Agriculture
University of Damascus during the growing season 2014, to study the
productivity of the maize cultivar ("Gouta 82) and the hybrids (Basel
1 and Basel 2) under the influence of tw