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  • 18
    Dec
    Soil-bedding method, water quality and irrigation dose on pepper yield 2006-7
    Vegetables

    תאריך עדכון 14/3/2008

    תיאור מלא Sweet pepper is the largest and most successful agricultural sector in the Arava valley yet, it faces problems of availability of fertile soils and water restricts its farther expansion. Innovative soil-bedding methods are, therefore, sought, to which the irrigation regime should be re-adjusted. The objective of the present study was to test the response of sweet pepper yield to different soil-bedding methods at differential irrigation quantity at two levels of water quality.
    Three methods of soil-bedding were tested. For the first method, 'nutrition duct' (ND), 40 cm wide, 20 cm deep ducts were dug in the 'Hamada' soil at 1.6 meter intervals. Tuff (0-8, Tuff Merom Golan Company) was laid inside the ducts at a uniform volume of 50 liter/m3. The second soil-bedding method tested was the restricted root zone (RRZ) system, in which a thin layer of coarse Tuff that covered the bottom of the duct was coated with a thick technical cloth sheet (Agripal, Palrig) on top of which an equal volume of Tuff 0-8 was added. The third was the traditional method of sand-coating (40 cm sand layer on top of the Hamada soil). The experiment took place at Yair Station in the Arava. Sweet pepper seedlings (var. 7187) were planted (24/08/05) in a net-house (50 Mesh), distributed between the three soil-bedding treatments. The differential water quantities began 24 days after planting. The water quantities were adjusted once a week at four different levels according to refund indices of 0.5, 1, 1.5, and 2 of the current evaporation as recorded by a maximum lysimeter. At the end of the season, the water quantities accumulated to 350, 684, 962, and 1350 mm. The experiment structure was duplicated in order to allow two salinity levels of the water: 2.5 and 0.7 dS/m.

    שפה English
    מחבר Eviatar Ityel, Shai Aharon, Rivka Offenbach, Rami Golan, Israel Tzabari, Yoram Zvieli, Alon Ben-Gal
    שנה 2007
    שייכות yzvieli
    תאריך יצירה 14/3/2008
    תאריך עדכון 14/3/2012

    NASHAM
    נשמ
    נש"מ

    OPEN
  • 17
    Dec
    Effects of mycorrhiza on sweet pepper at various stress conditions
    Vegetables

    Absorption of nutritional mineral elements vital to the plant, by reinforcing the water uptake, by interacting with the plant hormonal balance, by improving soil structure and texture, and by strengthening the plant resistance to soil-borne pathogens. The influence of mycorrhizae (Glomus intraradices) on the response of sweet pepper (Capsicum annuum) to various stress factors has been examined in experiments conducted during the 2007 season. The stress factors investigated included a soil-borne disease – soil inoculation with Pythium, nutrition stress – phosphor shortage, and a combined salt and drought stress. Mycorrhized plants demonstrated a significantly higher resistance to stresses. Mycorrhized sweet pepper plants that were planted on a Pythium-inoculated soil displayed a rapid recovery from the typical inhibition stage followed by a normal growth and development. Likewise, mycorrhized plants exposed to low-phosphor fertilization obtained fruit yield at a similar level as normally fertilized plants. Furthermore, mycorrhized plants that were grown under combined salt and water stress or even with additional low-phosphor fertilization produced yields comparable to that of normally cultivated plants. On the other hand, whenever the pepper plants were not exposed to any type of stress, no advantage of mycorrhized plants could be observed in growth or yield at normal growing conditions. Commercial application of mycorrhizae may bring about a reduction in the water requirements for sweet pepper cultivation and improved plant sustainability under various stresses. Thus, the mycorrhizae can provide the grower with some level of insurance against predicted or unpredicted stress conditions that might occur in the field.

    שפה English
    מחבר Shimon Pivonia, Rachel Levitta, Yael Bar-Lavan, Yoram Kapulnik
    שנה 2007
    שייכות yzvieli
    תאריך יצירה 14/3/2008
    תאריך עדכון 14/3/2012

  • 8
    Jan
    DESERT AQUACULTURE IN ISRAEL DESERT 1996
    Aquaculture
    OPEN