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广东省徐闻县属高旱台地,全县土地面积18.62万hm~2,耕地面积5.782万 hm~2,其中高旱坡地4.16万hm~2,占耕地面积70%。糖蔗是这个县最大宗经济作物,也是这个县的经济支柱。经大力开发和扩种,现已达到3万 hm~2,占旱坡地面积69.7%。徐闻县糖蔗大多数种植在高旱坡地上,高旱坡地一个显著的特点是干旱缺水。长期以来,由于土壤水份供需不平衡,造成了甘蔗长期在低产区徘徊。70～80年代平均单位面积产量只有37t/hm~2。为了提高甘蔗单产,近几年来,农业与农机部门密切配合,在抓好推广优良品种和先进种植技术的同时,大力推广应用甘蔗机械深松耕技术,促使甘蔗单位面积产量大幅度提高。据统计,从1990～1997年的8年时间,徐闻县累计推广面积18.32万hm~2,占全县甘蔗种植累计面积22.9万hm~2的80%,年均产蔗61t/hm~2,比前8年年均产甘蔗45.5t/hm~2,增产15.5t,累计增产354.95万 t。最高年份1990年产蔗70.7t/hm~2,总产191万 t。1995年,在灾害频繁的情况下,仍达到61.5t/hm~2,总产179.58万 t。深松耕作技术其所以能使甘蔗获得稳产高产,主要是深松耕翻改变了土壤的理化性能,创造了甘蔗良好的生长环境。通过深耕或深松,打破了坚硬的犁底层,促使土壤
Xuwen County, Guangdong Province is a high altitude platform, the county land area of 186,200 hm ~ 2, arable land area of 57,820,000 hm ~ 2, of which 41,600 hm2 high slope, accounting for 70% of arable land. Sugar cane is the county’s largest cash crop, but also the economic pillar of the county. After vigorously developed and expanded, it has now reached 30,000 hm ~ 2, accounting for 69.7% of the area of dry slope. Most of Xuwen County sugar cane planted in the high dry slope, a prominent feature of high dry slopes is drought and water shortage. For a long time, because of the imbalance between supply and demand of soil moisture, sugar cane has long been hovering in the low-yield areas. The average output per unit area from 1970s to 1980s was only 37t / hm ~ 2. In order to improve the yield of sugarcane, in recent years, agriculture and agricultural machinery departments work closely with each other. While doing a good job of promoting fine varieties and advanced planting techniques, the sugarcane mechanical deep-plowing technology is vigorously popularized and promoted, and the yield per unit area of sugarcane is greatly increased. According to statistics, from 1990 to 1997, 8 years of Xuwen County accumulated a total area of 183,200 hm ~ 2, accounting for 80% of the accumulated area of 229,000 hm ~ 2 in the county with an average annual output of 61 tons / hm ~ The average annual output of sugarcane was 45.5t / hm ~ 2, 15.5t higher than that of the previous 8 years, and the total yield was 3.55495 million t. The highest year of 1990 sugar cane 70.7t / hm ~ 2, a total of 1.91 million t. In 1995, with frequent disasters, it still reached 61.5t / hm 2, with a total output of 1.9585 million tons. Deep pine farming technology so that it can make sugar cane to obtain stable and high yield, mainly through deep plowing changed soil physical and chemical properties, and create a good growing environment for sugar cane. Through deep plowing or deep plowing, breaking the hard plow floor, prompting the soil