Persimmon - Phytech

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Recommended Application in Persimmon

BACKGROUND

A Persimmon is the edible fruit of a number of species in the genus diospuros. Persimmon are generally light yellow-orange to dark red-orange in color and depending on the variety vary in size may be spherical, acorn or pumpkin-shaped. They are high in glucose, with the balanced protein profile and possess various medicinal and chemical uses.

There are two main types of persimmons varieties: American and Asian. Spreading the most in the Asian group - sort of Hachiya (Japanese persimmon, or Kaki). Israel launched a persimmon variety “Triumph”, featuring a high sugar content (25%) versus 16% in competing varieties and rich in potassium, manganese, iron, magnesium, vitamin C and B-carotene. Eating persimmon reduces the risk of atherosclerosis of heart and is considered a perfect diet food.

Due to its taste and health properties the persimmon is gaining popularity. In 1970, world production of persimmon was 91 thousand tons, by 2010 the production of persimmon is close to 3 million tons.

PYHTOMONITORING IN PERSIMMON

Phytomonitoring in persimmon may help to answer the following questions:
When to start irrigation season
How to irrigate at air drought (‘khamsin’)
How to adjust irrigation during every characteristic period of the growth season
How to irrigate after harvest

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Recommended set-up for 5 hectares Plant sensors:
	Dendrometer Sensor - 1 The Dendrometer is a highly precise incremental LVDT-based sensor for monitoring micro-variations of trunk radius in micron range. Plant growth and water balance affect diurnal behavior of trunk radius. The growth rate depends on a vegetation stage and environmental conditions. The diurnal variations represent mostly fluctuations of water content in plants. Two radius-based indices are commonly used for evaluating plant water status: daily contraction amplitude and trend of daily maxima. The Dendrometer allows investigating effects of irrigation rate and other environmental factors on water balance and growth of plants. Range of measurement: 0-10 mm Resolution: 0.005 mm Suitable stem diameter range: above 5 cm
	Fruit Growth Sensors - 1 Two phenomena affect fruit diameter. These are growth and internal water content. The growth component is usually dominant. At the same time, in some cases, the fruit may loose water that is manifested in deceleration of growth rate or even shrinkage of the fruit. It may be a result of water stress, lack of light, or another limiting factor. Thus, the FI-type sensor allows investigating effect of irrigation rate and other environmental factors on both water balance and growth of fruits. Range of measurement: (7 - 30 mm, 30-100mm, 15-70mm) Resolution: 0.01mm Temperature stability: 0.005 mm/c° max. Suitable fruit diameter range: (7 - 30 mm, 30-100mm, 15-70mm)
Soil sensors:
	Tensiometer Sensor - 2 Measures water tension in the soil Pipes length: 30 cm, 60 cm, 90 cm Measurement range: 0 - 84 cBar Temperature range: 0-40 C
	Soil Moisture Sensor - 2 Monitors the volumetric water content (VWC) of the soil Comes with 5cm two prong design Measurement Range 0-70% moisture
	Environmental sensors:
	Phytech’s Weather station Including 6 sensors: 1. Wind Speed meter. 2. Wind Direction (optional: Leaf wetness) 3. Rain Meter. 4. Irradiation meter. 5. Air temperature. 6. Air humidity.