牧草に対する農機具踏圧の影響
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概要
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1. Though hay making can be mechanized by using large type machineries, one deposit of finished hay cnsists of seven to nine processes of works and they make frequent visits of machineries to grassland. Consequently the soil there is tightly packed, the solidity down to 15cm below ground surface becomes higher, solid phase portion of the soil increases and porosity rate decreases. 2. Soil packing be farm machine tread on mixed sown pasture grasses brings poorer regrowth of grasses after cutting and it results in lower forage yield. Particularly when cut grass is left on the field for sun drying, number of withered plants increases, speed of regrowth retards and consequenly the lowest forage yield results in. 3. A series of experiments were conducted concerning soil packing by farm machine tread, height of cutting and effect of cut grass left on the field. The results obtained were as follows: a. Growing speed of regrowing leaves was highest in plots of on treat and as number of tread increased, growing speed slackend, the slowest regrowth being shown in plots of 5 time machine tramplings. Treatments by various cutting heights and by cut grass handlings showed no clear differences. b. Green forage yield showed exceeding differences by tread treatments. One time tread gave the highest yield, and 0, 3 and 5 time treads gave respective lower yields in that order, the last one i. e. 5 time treads giving the lowest yield. c. Number of surviving plants were few in plots of frequent tramplings like 5 and 3 treads and occurence of withered plants was observed there. Many number of plants survived in the plots where trampling number was few like 0 and 1. In plots where days cut grass left on the field were many or where cutting height was low, number of surviving plants was few, and in plots where cut grass was carried out of the field at once or where high cutting was made, surviving plants were many in number. d. The results of cut grass handling and cutting height after top-dressing ammonium sulphate and 3 time machine tramplings showed that number of withered plants increased and green forage yield was lowest when cut grass left 7 days on the field and grass cut low.
- 日本草地学会の論文
- 1966-03-30
著者
関連論文
- 31.大型農機具の牧草踏圧に関する試験(草番の造成・管理,日本草地学会第9回大会講演要旨)
- 38.樹林傾斜地における簡易草地造成試験(草地造成・管理,第18回発表会講演要旨)
- 牧草に対する農機具踏圧の影響