油菜硼肥的施用通常是用千分之二到三的硼酸或硼砂溶液进行喷施。不同时期喷施的效果一般认为苗期>蕾苔期>开花期,但也有晚喷比早喷好、抽苔、开花期比苗期喷好的报导。据我们在永泉大队的观察,在花岗岩红壤地区严重缺硼的土壤上,油菜有七片真叶时开始表现缺硼症状:根颈部膨大,根系发育不良,部分植株基部叶片叶缘变红。我们用0.2％的硼酸溶液于叶期、蕾苔期各喷施一次,缺硼症状仍无明显改善,单产仅五、六十斤。为此,我们采用田间试验,大面积调查与室内分析相结合的方法,进行了硼肥用量和施用方法的研究。一、小区试验与大田调查田间小区试验在我所永泉基点进行,处理设计方案如下: (1)不施硼肥(对照)。 (2)蕾苔期、初花期各用0.5％的硼 Rape boron fertilizer application is usually carried out with two to three per cent of boric acid or borax solution spraying. Spraying at different times generally considered the effect of seedling stage> bud period> flowering stage, but there are also better than the late spray good morning bolting, bolting, flowering than the seedling spray good report. According to our observation at the Yongquan Brigade, boron-deficient symptoms began to appear when seven true leaves of rape were present in heavily boron-deficient soils of the granitic red soil region: swelling of the root and neck, poor root development, reddening of the leaf margin at the base of some plants . We use 0.2% boric acid solution in the leaf stage, the bud period of spraying once, boron deficiency symptoms still no significant improvement, yield only five or sixty catties. To this end, we use the field test, a large area survey and indoor analysis a combination of methods for the amount of boron fertilizer and application methods. First, the plot test and field investigation Field plot test in our Yongquan basis point, the treatment design is as follows: (1) no boron fertilizer (control). (2) Lycium period, early flowering each with 0.5% of boron