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１９９３—１９９５年中英就云南坡地红壤的侵蚀及保持方法进行了合作研究。试验分别设坡度、种植行向和不同的耕种措施为处理；供试作物；玉米（ＺｅａｍａｙＬ．）；三年的试验结果表明，麦杆覆盖在三个坡度上都能有效地减少径流，从而减轻土壤流失；地膜覆盖产生的径流最多，造成的土壤流失最严重；两者在玉米生产季节产生的径流量和流失土量（三年平均）分别为８３２．９５ｍ３／ｈａ，１．２７ｔ／ｈａ和１０８４．０５ｍ３／ｈａ、５．９２ｔ／ｈａ，差异都达极显著水平。传统耕翻的径流量和流失土量为９６６．６ｍ３／ｈａ和５．７４ｔ／ｈａ，与麦杆覆盖相比，流失土的差异极显著。不同耕种措施产生的径流和土壤流失量的顺序相同，依次为地膜覆盖＞传统耕翻＞免耕＞间作＞麦杆覆盖。沿等高线种植的流失土量为３．５５ｔ／ｈａ，顺坡种植为５．０６ｔ／ｈａ，差异显著；径流量两者无差异。随坡度的增加，土壤侵蚀逐渐加重；３°的径流量显著少于１３°和３１°；坡度与径流量及流失土量为正相关。与上述结果不同，五种耕种措施中，地膜覆盖的玉米产量最高，达４．６１ｔ／ｈａ，传统耕翻最低，为３．８５ｔ／ｈａ，两者差异极显著；麦杆覆盖的产量居中（４．１９ｔ／ｈａ），但显著高于传统耕翻?
In 1993-1995, China and Britain conducted a cooperative study on the erosion and maintenance of red soils in the slope areas of Yunnan. The experiments were conducted on the basis of slope, planting orientation and different tillage measures; the test crops; corn (Zeamay L.); three-year trial results showed that wheat straw covering all three slopes can effectively reduce runoff and thus reduce Soil loss; the largest runoff produced by plastic film mulching, resulting in the most serious soil loss; both the runoff and soil loss (three years average) in the corn production season were 832.95m3 / ha, 1.27t / ha and 1084.05m3 / ha, 5.92t / ha, the difference reached the extremely significant level. Traditionally, the runoff and soil loss were 966.6m3 / ha and 5.74t / ha, respectively. Compared with the wheat straw cover, the difference of soil loss was extremely significant. The order of runoff and soil loss caused by different tillage measures is the same, covering mulching> conventional tillage> no-tillage> intercropping> straw cover. The amount of soil loss along the contours was 3.55 t / ha and that on the slope was 5.06 t / ha. There was no significant difference in runoff. With the increase of slope, the soil erosion gradually aggravated; the runoff at 3 ° was significantly less than 13 ° and 31 °; and the slope was positively correlated with runoff and soil loss. In contrast with the above results, among the five cultivation measures, the yield of mulch covered maize reached 4.61 t / ha and the lowest was 3.85 t / ha, the difference was significant 4.19t / ha), but significantly higher than the traditional farming?