老压砂地西瓜水肥效应研究

Study on Water and Fertilizer Effect for Old Gravel-Mulched Field Watermelon

针对宁夏中部干旱带压砂地随着压砂年限的增加生产力下降问题,从补水定额、施肥水平和补水次数方面入手,探索影响老压砂地生产力的主要因素,提出解决制约老压砂地生产的水肥方案。于2009年和2010年在宁夏中卫市香山乡红圈子村采用正交方法进行了桶栽试验研究,结果表明:桶栽条件下的最佳组合为补水定额37.5m3/hm2;施有机肥1 200kg/hm2,二铵91.5kg/hm2,尿素157.5kg/hm2,硫酸钾94.5kg/hm2;补水次数7次。经方差分析可知,补水定额对产量的影响效果极为显著,施肥水平和补水次数对产量的影响效果不显著,对试验结果影响不显著的因子可以依经济、方便为原则任选一水平。

Aiming at the problem of production reduction of gravel-mulched field with the increase of gravel-mulched years in the mid- dle arid region of Ningxia, the research started from the aspects of supplement water quota, fertilizing amount and supplement water times to explore the main influencing factors for productivity of gravel-mulched field and put forward the water and fertilizer scheme. The bucket-planted tests adopting orthogonal method were conducted in 2009 and 2010 year in Hongjuanzi village, Xiangshan town- ship, Zhongwei city of Ningxia. The results indicated that under the bucket-planted condition, the best combination of water and fer- tilizer factors is supplement water quota 2. 5 ma/hm^2, organic fertilizer 80 kg/hm^2, Ammonium dihydrogen Phosphate（MAP）6. 1 kg/hm^2, carhamidel0.5 kg/hm^2 ,lemery salt 6.3 kg/hm^2 , supplement water 7 times. By variance analysis, it can be found that the supplement water quota had extremely significant influence on yield, while the influences of fertilization level and supplement water time were not significant, and the factors, which had not significant influence on test result, could be discretionarily selected accord- ing to the economical and convenient rules.