आर्द्रता, वाष्पीकरण और संघनन
सापेक्ष आर्द्रता को हमेशा तापमान के साथ पढ़ें, क्योंकि पानी बेड से भाप बनकर उड़ता है और ठंडी सतह पर बूंद बनकर बैठ जाता है।
- By the end you can read humidity together with its temperature.
- By the end you can explain where the bed loses its water.
- By the end you can tell condensation problems from substrate problems.
लक्षण से कारण तक
पहली नज़र, निदान नहीं। स्रोत: ICAR-DMR मैनुअल और रोग बुलेटिन।
| क्या दिखता है | संभावित कारण | पहला कदम |
|---|---|---|
| लंबी डंडी, छोटे कैप | CO₂ ज़्यादा (1,500 ppm से ऊपर) | ताज़ी हवा बढ़ाएं |
| कम्पोस्ट पर हरे धब्बे | ट्राइकोडर्मा; कम pH या बची अमोनिया | अलग करें, हटाएं; अगला बैच जांचें |
| केसिंग के बाद पिन नहीं | ठंडा और हवादार नहीं किया | 16 से 18 °C, हवा दें |
| कैप पर भूरे धंसे धब्बे | बैक्टीरियल ब्लॉच; गीले कैप | सतह सुखाएं, नमी 85% से कम |
| सफेद गीली गांठें | वेट बबल, केसिंग से | नमक से ढकें, हटाएं; केसिंग को भाप दें |
| छोटी मक्खियां | सियारिड/फोरिड | जाली, लाइट ट्रैप, स्वच्छता |
ये आंकड़े संबंधित स्रोत और विधि के संदर्भ में हैं। इन्हें हर प्रजाति या फार्म का सार्वभौमिक निर्देश न मानें। पुराने मूल्य वर्तमान बाज़ार भाव नहीं हैं।
Look, explain, then apply
Three different water observations. The blank dial is symbolic, not a measurement, and the pictured wet substrate and cap are not target conditions.
See where this fits in the full workflow →01Humidity is a ratio, not an amount
Relative humidity says how full the air is compared with how much it could hold at that temperature. Warm the same air and the reading falls without a drop of water leaving the room.
So a humidity figure means nothing on its own. Always write the dry bulb temperature next to it.
ICAR-DMR sets 95 percent during button spawn run and case run in a controlled room, then reduces it to 85 percent for cropping. A naturally ventilated seasonal shed cannot hold 95 percent, which is why the Hindi folder gives 80 to 90 percent for the same stage.
02Evaporation is the crop drinking
DMR measures the loss: about 31 grams of water evaporates from one square metre of bed every hour at 17 C and 85 percent humidity.
That water has to be replaced or the casing dries and pinning stops. The manual gives a simple rule for watering after picking: for every kilogram of mushroom harvested, add one litre of water.
Casing moisture at pinning should sit near 50 percent, which DMR states as 50 plus or minus 2 percent. Water lightly and often rather than heavily once, and water the casing surface rather than the mushrooms themselves.
03Condensation is a surface problem
When moist air touches a surface colder than its dew point, water forms on that surface. In a mushroom room those surfaces are the ceiling, the cold panel near the air handler, and the mushroom cap itself.
This matters because of one threshold. DMR records that bacterial blotch spreads when a free water film stays on the cap for more than three hours, and at 20 C or above.
NHB adds the operational rule: avoid humidity above 85 percent together with temperature above 20 C, and give extra ventilation and air movement after watering so that caps dry quickly.
04Substrate moisture is a different measurement
Air humidity and substrate moisture are separate numbers and separate instruments. Mixing them is a common error.
DMR gives finished synthetic compost at 68 to 72 percent moisture at spawning and 64 to 66 percent after Phase II. Above 72 percent the compost cannot breathe and plaster moulds appear. Below 64 percent, with a wet casing over it, NHB reports weeper mushrooms.
Other crops carry their own figures: milky substrate at 65 to 70 percent, shiitake blocks at 60 to 65 percent. Learn to test moisture by squeezing a handful, and record what your hand felt each time.
Find where the water goes
- Write the humidity and the temperature together at every reading.
- After watering, time how long free water stays on the caps.
- Touch the ceiling and the coldest wall an hour after watering.
- Weigh the mushrooms picked and add one litre of water per kilogram.
- Squeeze a handful of casing and note whether the palm stays damp.
डायरी में लिखें: Time, humidity with its temperature, minutes until caps dried, litres added, and where condensation was found.
ये गलतियां न करें
- Recording humidity without its temperature, which makes the number unusable later.
- Heavy watering just before closing the room, leaving films on caps all night.
- Treating air humidity and substrate moisture as the same measurement.
खुद को जांचें
तीन सवाल, तुरंत जवाबWhy must humidity be written with a temperature?
How much water does DMR add after picking?
Free water stays on caps for four hours. What is the risk?
यह संपादकीय स्व-जांच है, प्रमाणपत्र नहीं। जवाब इस डिवाइस पर भी सहेजे नहीं जाते।
शब्दावली
- Relative humidity
- How full the air is with water at its current temperature.
- Dew point
- The temperature at which air starts forming water on a surface.
- Dry bulb
- The plain air temperature read by an ordinary thermometer.
संदर्भ और आगे पढ़ें
Biological requirements are not equipment selections.
संदर्भ खोलें