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首页> 外文期刊>Sugar Tech >The Practice of Green Cane Trash Blanketing in the Irrigated Zone of Mauritius: Effects on Soil Moisture and Water Use Efficiency of Sugarcane
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The Practice of Green Cane Trash Blanketing in the Irrigated Zone of Mauritius: Effects on Soil Moisture and Water Use Efficiency of Sugarcane

机译：毛里求斯灌溉区绿蔗垃圾掩蔽的实践：对甘蔗土壤水分和水分利用效率的影响

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摘要

Sugarcane growers in Mauritius are using mechanized harvesting to reduce costs. This practice results in a trash blanket which contributes to conserve soil moisture, but potential savings in irrigation water have yet to be quantified. An on-farm study was undertaken at three sites in the irrigated coastal zone of Mauritius under sub-humid to humid mega-thermal climate and soils that were oxisol or inceptisol. Trials were conducted in ratoon crops under centre pivot irrigation and treatments with or without trash blanket, as well as different irrigation regimes. Sensors were used to log soil moisture data at 20, 40 and 60 cm depths. Increased drainage was observed under trash blanket during rainfall events and cumulative drainage for a 4-month wet period amounted to 43 and 240 mm for no-trash and trash blanket treatments respectively. Daily crop water use was higher with trash blanket, consumption being 4.9 and 5.1 mm day(-1) compared to 4.2 and 4.6 mm day(-1) for no-trash during peak growth at Savannah and M,dine. Sugarcane yield was higher by 7.2 and 6.6 t ha(-1) year(-1) with trash blanket compared to no-trash, whereas water use efficiency increased by 8 and 9 kg ha(-1) mm(-1). At Saint Antoine, trash blanket increased the yield difference between irrigated and rainfed crops by 8.6 t ha(-1) and improved water use efficiency by 7 kg ha(-1) mm(-1) when irrigated. Seasonal water equivalence of the trash blanket amounted to 62, 54 and 72 mm water at Savannah, M,dine and Saint Antoine, a potential saving of 10-15 % in irrigation water.
机译：毛里求斯的甘蔗种植者正​​在使用机械收割以降低成本。这种做法导致了一个垃圾毯，该垃圾毯有助于保存土壤水分，但灌溉用水的潜在节省量尚待量化。在毛里求斯的灌溉沿海地区的三个地点进行了农场研究，该地点处于半湿润至湿润的超高温气候和土壤中的羟丁酚或庚二酚。试验在再生农作物进行中枢轴灌溉和有无垃圾毯的处理以及不同的灌溉方式下进行。传感器用于记录20、40和60厘米深度的土壤湿度数据。降雨期间，在垃圾毯下观察到排水增加，对于无垃圾和垃圾毯处理，在4个月的潮湿期中，累积排水分别为43和240 mm。萨凡纳（Savannah）和M.dine高峰期无垃圾的日用水量为4.9和5.1毫米天（-1），而无垃圾的日用水量为4.2和4.6毫米天（-1）。与无垃圾桶相比，带垃圾毯的甘蔗产量分别高7.2和6.6 t ha（-1）年（-1），而水分利用效率分别提高了8和9 kg ha（-1）mm（-1）。在圣安托万，垃圾毯使灌溉和雨养作物之间的产量差异增加了8.6 t ha（-1），灌溉后的水分利用效率提高了7 kg ha（-1）mm（-1）。在萨凡纳，M，Dine和圣安托万，垃圾毯的当季水当量分别为62、54和72毫米水，这可能节省10-15％的灌溉用水。

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