On the micro-aircurrent of the silkworm rearing room for earlier stage of the worms
1955 Volume 10 Issue 3-4 Pages 91-95
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1955 Volume 10 Issue 3-4 Pages 91-95
On the micro-aircurrent for ealier stage of the silkworms, we have been investigated from standpoint of Gun-San type (Domoro type) silkworm rearing room. We observed the aircurrent of the room with Kata-Thermometer. The results obstained are as follows.
1) The micro-aircurrent of the the silkworm rearing room “Domoro type” is different by silkworm rearing seasonal variation and are represented as following order of their magnitude: summer rearing>auttumn r.>spring r.
2) The micro-aircurrent of the Domoro rearing room is different by larva insecter stage, represented as following order of their magnitude: feeding larva 3rd insecter>1st and 2nd moulting period>feeding larva 1st and 2nd insecter.
3) In general, the micro-aircurrent of the Domoro rearing room is always lower than that of the silkworm normal rearing room. On the 1st and 2nd feeding insecter, the rate of the micro-aircurrent of the Domoro type is about 20-30% in the spring rearing, 62-66% in the summer r., 86-87% in the autumn r. of the silkworm normal rearing room. The Domoro micro-aircurrent magnitude of feeding larva 3rd insecter and 1st·2nd moulting period, We can increase or decrease as well as the normal rearing room by treat of the absorb and expel air-canal.
4) Domoro aircurrent is largest at the forward part, the posterior p. next and the central p. smallest on the horizontal distribution. It is also to note that the vertical distribution is seemingly largest at the lower part, the upper p. next and the middle p. smallest.
5) On the aircurrent difference, the horizontal distribution is always smaller than that of the vertical distribution in the spring and autumn rearing season, but it is seemingly in the reverse order of the summer rearing season.
6) On the 3rd larva stage, we can increase 10% micro-aircurrent by use of the suqqlement canal on the expel air-canal.
7) The outside room absorb air-canal are very good to use two canal that of one on the hence Domoroestablish.
