Development of mulberry hervesting system suitable for frequent silkworm rearing
1995
Naoi, T. (National Inst. of Sericultural and Entomological Science, Tsukuba, Ibaraki (Japan)) | Kobayashi, T.
In the present study a mulberry harvesting system aimed at producing 10 tons of cocoons by rearing silkworms 10 times in a year was developed. A sericultural farmer has to work only one week for harvesting mulberry in each silkworm rearing period. Mulberry leaves are usually, harvested 2 to 4 times during tow years in three different ways- (1) twice a year, (2) three times in 2 years and (3) once a year. 1) In the present experiment a leaf harvesting model was constructed/designed for silkworm rearing. Every time mulberry shoots were harvested with a binder-type harvester, in the mulberry plantation with-medium density plantation (150cm x 50cm) and high density plantation (100cm x 50cm), respectively. Plant growth was found to be almost the same in both types of spacing. different harvesting regimes were adopted for different gardens depending on the silkworm rearing schedule. 2) Mulberry leaves were harvested once a year from the summer pruned garden. Therefore, leaf yield was lower for the 8th, 9th and 10th rearranges. 3) The experimental data showed that 8.5 tons of cocoons could be produced by rearing 270 boxes of silkworm eggs in a year with leaf harvesting and silkworm rearing performed 10 times. On an average 1,209 tons of cocoons were produced per hectare mulberry field. 4) These results showed that the experimental systems using a binder-type harvester can be applied to multiple silkworm rearing. 5) Also, a model system for leaf harvesting suitable for multiple silkworm rearing by riding a stride type harvester was suggested based on the experiments. Further field trial are currently being carried out to confirm the present results
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