桂西南木薯滴灌水肥高效利用试验研究

Test and study of efficient utilization of water and fertilizer in cassava drip irrigation in South-western Guangxi

结合桂西南地区木薯种植特点,在广西水利科学研究院陇铎试验基地,采用华南205木薯品种,通过30种水肥处理方式的田间试验,对木薯滴灌水肥高效利用进行了分析研究,结果:最优灌水量为田间持水率的16%,丰水年灌水5次灌水量156.8 mm,平水年灌水6次灌水量190.4 mm,枯水年灌水7次灌水量218.4 mm,可增产30.2%;最优施肥为基肥40 kg/亩、苗肥20 kg/亩、结薯肥20 kg/亩,可增产114%。

Combined with the planting characteristics of cassava in the South-western area of Guangxi, at the Long- duo testing base of Guangxi Hydraulic Research Institute, with the cassava breed of south china 205, field tests of 30 kinds of water-fertilizer processing manners were conducted to study the efficient utilization of water and fertiliz- er in cassava drip irrigation. The results of study demonstrate the optimum water amount is 16% of field water-hold- ing capacity and the irrigation amount is 5 times and 156.8mm in wet year, 6 times and 190.4ram in average year and 7 times and 218.4mm in dry year, with a yield rise rate of 30.2%; the optimum fertilizer amount is 60g/m2 for basal fertilizer, 30 g/m2 for seed bed and 30 g/m2 for tuberization, with a yield rise rate of 114%.