据中国农科院油料研究所陈仲西等人研究,当土壤中水溶性硼低于0.5ppm,即可出现不同程度的缺硼症状,造成减产。而当水溶性硼达到0.7ppm 或略高于时,可显著增产。根据他们在田间试验,亩施底肥复混肥(N:p:k=10:8:7)75公斤的基础上:①以不施硼肥和有机肥为对照,土壤含水溶性硼0.2ppm,亩产68.3公斤;②每亩喷0.2%的硼砂液50公斤, According to the Chinese Academy of Agricultural Sciences, Institute of Oil Chen Zhongxi and others, when the soil soluble boron below 0.5ppm, you can appear in varying degrees of boron deficiency, resulting in reduced production. When the water-soluble boron reaches 0.7ppm or slightly above, it can significantly increase yield. According to their field experiment, based on 75 kg of compound fertilizers (M: p: k = 10: 8: 7): ①The soil contains boron 0.2ppm, Per mu yield 68.3 kilograms; ② 0.2% per mu spray borax 50 kg,