本省丘陵山地红壤柑桔园,由于土硬瘠瘦、酸、粘,结构差、易受旱害等问题.影响柑桔根群生长和产量、品质。实验表明,改土培肥,创造良好的根部土壤环境,促使根系更新增生,是柑桔丰产一项关键措施,但对最适宜改土时期和深度,尚有不同看法,亟需进一步研究,为此,1977年起进行此试验,结果如下供参考。 The citrus orchards in the hilly and mountainous regions of the province have some problems, such as poor and poorly-leached soil, poor acidity, stickiness, poor structure and drought resistance, which affect the growth, yield and quality of citrus root groups. Experiments show that soil improvement and fertilization, to create a good root soil environment, to promote root regeneration, is a key measure of citrus yield, but the most suitable time and depth of soil modification, there are different views, further study is needed This test was conducted in 1977, the results are as follows for reference.