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灌淤土主要是由于灌溉水的淤积而形成的一种土壤.它广泛分布于我国西北干旱灌溉地区,如内蒙、宁夏、甘肃、新疆等省区的灌溉绿洲,就有大面积的分布.新疆南部和田和咯什专区的老灌溉绿洲中,几乎普遍地分布着此种土壤.一、灌淤土的形成灌淤土也有它一定的形成条件:在自然条件方面它多形成于干旱的栗钙土、棕钙土、灰钙土、灰漠土和棕漠土等地带性的土区内,因为这些土壤水分少,不灌溉就不能进行农业生产,所以灌溉是形成灌淤土的主要因素.灌溉水很少是纯净的,经常夹带泥沙和其他悬浮物质,根据观察测定:新疆玛纳斯县境内的塔西河河水含泥沙量年平均为8～9%.平时渠道水中的泥沙含量变动在1～2%之间、洪水期间可达4～5%,
Irrigated silt is mainly formed by the siltation of irrigation water, which is widely distributed in the arid irrigated areas in northwestern China, such as the irrigated oases in Inner Mongolia, Ningxia, Gansu and Xinjiang provinces. In the old irrigation oases in the southern Hotan and Kashgar prefectures, such soil is almost universally distributed: 1. Irrigation silt formation Irrigation silt also has its formation conditions: in natural conditions, it is mostly formed in dry chestnut calcium Soil, brown earth, calcareous soil, gray desert soil and brown desert soil and other belt-type soil areas, because these soil moisture is less, no irrigation can not be agricultural production, so irrigation is the main factor in irrigation silt soil. Irrigation water is rarely pure, often with sediment and other suspended matter, according to the observation and determination: Manasi County in Xinjiang Tisha River water sediment content of an average of 8 to 9%. Ordinary channel water sediment content Changes in 1 to 2% between the flood up to 4 to 5%