Ah...I see my phone got the best of me again! Ha!
Yes, "laying" should be inserted for "Latin." My classes at the UofA helped alot with this. I have had lighting on in my coops since early November. It causes the pituitary glands to kickstart the breeding cycles. Which causes eggs to be laid and males that have been exposed to light, at least 14 hours of it, are more vivacious about breeding. So, I make sure that when I want my birds to begin breeding, that I allow for 14 hours of light, if not more. NOW. That being said...that barn was COLD. So, I put a heat lamp up there all night, which resulted in them getting 24 hour lighting, which again, was fine as I had chicks that were up there and needed the heat and a good source of food.
Now that I have reached the end of my breeding season (last batch of eggs went out and I am DONE), I have turned off the lights for the night time hours. This will cause my chicks, which are still growing, to cut back on their sexual maturity rate. It will also cause my females to drop off in egg production, and if I am lucky, begin their molting process.
You can further alter the lighting period, but hanging dark covers over the windows of your barn. (Mine are in an enclosed barn, I do NOT want a bear in my chicken pens thank you very much!) This will drop the photoperiod (light time). The longer it takes for your birds to reach sexual maturity, the larger your bird will be. Why? Because they are not focused on reaching sexual maturity and using their resources for reproduction. Instead, they are using their resources to continue to build their bodies up.
Langshans are a very large bird, the first thing I want them to build up is their frame. Once the frame is built, then the muscling can begin. A good male is not fully muscled until 2 or 3 years old. Most culls are LONG gone by that point. But, the females are usually done with their growing by a year. And, since you have staved off the reproduction at an early age, are able to begin hatching almost immediately as the eggs will be larger as the reproductive tract has had time to mature (muscling!) instead of being rushed by hormones that have been triggered by the hours of light.
Did that make any sense at all?
As for the broodiness, I am inclined to agree. First, it was Lil Ropo (a gifted) Cochin bantam, then it was my sweetest Langshan bantam (she-devil from Hades now with chicks!!!!) and now it is my best Largefowl Blue Langshan pullet. Let's hope no more decide to "mother" me to death! I'm kind of in shock she did it. She had been threatening it for months!