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已经报道过,在印度北部,于4月—6月炎热干旱的季节里,土壤水份不足和土温过高都会限制甘蔗的生长。为此,作者在沙壤土中进行了三年田间试验,以评价0.50、0.75和1.00比率的皿蒸发量三种灌溉方案及不覆盖和每公顷用6吨稻秆覆盖水准对甘蔗产量和质量的影响。不同的灌溉处理限于季风前10—12周采用。灌溉和覆盖稻秆对甘蔗株高和产量都有良好的影响。1.00比率较之0.50的皿蒸发量灌溉,平均增产13.8%。同样,覆盖稻秆比不覆盖的也平均增产13.8%。有趣的是,以0.50比率的皿蒸发量灌溉并覆盖稻秆的甘蔗产量较1.00比率与无覆盖的高。即使甘蔗产量相同,但是,有覆盖比不覆盖的少用34厘米灌溉水。这些良好的结果是由于覆盖对调节土壤湿度和温度都比较好的缘故,但是,灌溉和覆盖并不影响蔗汁的质量。这些结果表明,在亚热带地区,用稻秆覆盖和早期根据1.00比率的皿蒸发量对甘蔗进行灌溉,是一项可行的增产措施。
It has been reported that in northern India during the hot and dry April-June season, insufficient soil moisture and high soil temperatures will limit the growth of sugarcane. To this end, the authors conducted a three-year field trial in sandy loam soil to assess pan evaporation at rates of 0.50, 0.75, and 1.00. Three irrigation scenarios and their effects on yield and quality of sugarcane were covered and covered with 6 tonnes of rice straw per hectare . Different irrigation treatments are limited to 10-12 weeks before monsoon. Irrigation and covering of rice straw had a good effect on plant height and yield of sugarcane. 1.00 irrigation rate compared with 0.50 pan evaporation, an average increase of 13.8%. Similarly, rice straw covered an average increase of 13.8% over non-covered straw. Interestingly, sugar cane yields irrigated and covered with rice straw at a rate of 0.50 were more than 1.00 and uncovered. Even with the same output of sugar cane, there is 34 cm less irrigation water covered than uncovered. These good results are due to the fact that the cover is good for regulating soil moisture and temperature, but irrigating and covering does not affect the quality of the cane juice. These results indicate that irrigating sugarcane with rice straw mulch and early pan evaporation based on a 1.00 ratio is a viable stimulation in subtropical regions.