微喷灌不同灌溉定额对赤红壤西瓜产量和品质的影响

Effects of different micro-sprinkler irrigation quotas on yield and quality of watermelon planted in lateritic red soil

以微喷灌作为灌溉方式,设置1350 m3/hm2(M1)、1800 m3/hm2(M2)、2400 m3/hm2(M3)、2700 m3/hm2(M4)4种灌溉定额,以不灌溉作对照(CK),研究不同灌溉定额对赤红壤试验区西瓜产量和品质的影响。结果发现:(1)微喷灌有助于提高西瓜产量,其中,M3单果重最大,M2产量最高。(2)微喷灌有利于提升西瓜品质,其中M1可溶性糖含量、M3蔗糖含量以及M4维生素C含量均高于其他处理。根据隶属函数的计算结果,各处理综合加权值的高低排序为:M2>M3>M4>M1>CK。说明以微喷灌为灌溉方式、灌溉定额1800 m3/hm2的灌溉制度对赤红壤西瓜的增产提质作用最显著。

For the micro-sprinkler irrigation method,four irrigation quotas of 1350 m3/hm2(M1),1800 m3/hm2(M2),2400 m3/hm2(M3)and 2700 m3/hm2(M4)were tested with no irrigation as the control(CK),to study the effects of dif⁃ferent irrigation quotas on the yield and quality of watermelon planted in lateritic red soil.The results of test show that:(1)Micro-sprinkler irrigation is helpful for increase of watermelon yield,of which M3 renders the highest sin⁃gle fruit weight and M2 renders the highest yield;(2)Micro-sprinkler irrigation is beneficial to improve the quality of watermelon,and the soluble sugar content of M1,sucrose content of M3 and vitamin C content of M4 were higher than that of other treatments.According to the calculation results of membership function,the order of comprehen⁃sive weight value of experimental treatments was M2>M3>M4>M1>CK.The irrigation system of micro-sprinkler ir⁃rigation with a quota of 1800 m3/hm2(M2)had the most significant effect on yield increase and quality improvement of watermelon planted in lateritic red soil.