جستجوی مقالات مرتبط با کلیدواژه "خاکپوش" در نشریات گروه "باغبانی"

To evaluate the effect of different levels of irrigation as well as different types of mulches on some physiological and morphological traits of greenhouse cucumbers an experiment was conducted as split plot based on randomized complete blocks design with three replications. Irrigation were considered as the main plot in three levels (100, 80 and 60 percent of water requirement) and mulch levels were considered as subplot in four levels (no mulch, black plastic, transparency plastic and wood chips). Plant height, stem diameter, percent of dry weight of shoot and leaf, chlorophylls a and b as well as total chlorophyll, early yield, yield of cucumber grade1 and 2, total yield and water use efficiency were evaluated. The results showed the most levels of most features were attained at 100 percent level of irrigation. Some traits such as plant height, shoot diameter, chlorophylls a and b as well as total chlorophyll, and yield were decreased by applying 1evels of irrigation (100, 80 and 60 percent of water requirement). The highest yield of cucumber grade1 and total (3514 and 3684 g/plant, respectively) were recorded for 100 percent level of irrigation with adoption of wood chips mulch. The results of this research represented that applying wood chips mulch was completely efficient and beneficial in most studied physiological and morphological features of cucumber because of maintaining soil moisture and optimizing application of that in irrigation management that can increase productivity of greenhouse crops especially in arid and semiarid areas.

This experiment was conducted to study the effect of plastic mulch on the growth and some physiological characteristics of two strawberry cultivars (Paros and Queen elisa) under drought stress. A factorial experiment was performed based on randomized complete block design with four treatments, including mulch, without mulch, normal irrigation (control) and deficit irrigation (-10 bar) with three replications. Some vegetative and physiological parameters in first year and yield of second year were measured. Results showed that leaf relative water content and stomatal conductance reduced by drought stress in both cultivars. Using of mulch increased leaf relative water content, cell membrane stability index and stomatal conductance in both cultivars compared with drought stress conditions. Drought stress reduced cell membrane stability index in Queen Eliza. However, Parus had higher cell membrane stability index than Queen elisa under drought conditions. Proline and total soluble carbohydrates significantly increased in both cultivars under drought stress compared to control. The amount of total soluble carbohydrates increased in Parus under drought conditions even with using mulch. Root to shoot dry weight ratio was increased under drought stress. Reduction of total dry matter was obtained by decline in leaf and petiole dry matter. However, application of mulch had significant effect on increasing of root dry weight, volume and length under drought stress. Yield of next year increased by mulch application under drought stress compared to non-mulch application. Results showed that using plastic mulch improved growth characteristics of strawberry under drought stress and helped to lower reduction of next year yield.

To study the effects of four types of mulches including wood chips, municipal compost, sawdust and gravel in three different thicknesses on growth of Platanus orientalis during two years, an experiment was conducted in Mashhad area with semi-arid climate. The research was conducted as split plot based on a completely randomized block design with four replications. Treatments included control (no mulching) and four types of mulch including wood chips, municipal compost, sawdust and gravel in three thickness (5, 10 and 15 cm). During the study, soil moisture and temperature, total leaf number, fresh and dry weight of leaves, tree height, fresh weight of tree, trunk circumference at height of 20 cm from soil surface was measured. Sawdust mulch with 15cm thickness had highest soil moisture and lowest soil temperature. All factors in sawdust mulch with 15cm thickness showed the highest growth characteristics. In all factors (tree fresh weight, leave fresh and dry weight, tree height, total number of leaves and trunk circle at 20 cm height) increasing of mulch thickness led to increased rate of growth and the best results was observed at 15cm thickness of all kinds of mulches. There were no significant difference among mulch types on height of the tree but all mulch types had significant difference with control. In the other measured factors including total leaf number, fresh and dry weight of leaves, fresh weight of tree, trunk circumference at height of 20 cm from soil surface, the highest growth was related to sawdust, wood chips, compost, gravel and control, respectively. It seems that sawdust with keeping soil moisture and reducing drought stress could help better growth of the plants compare to other mulches in dry and semi-arid areas.