长期定位施肥对土壤有效硼含量的影响

Effects of long-term located fertilization on the available boron content of soil

试验研究长期定位施肥对土壤有效硼含量的影响结果表明，无肥、N、NP、NPK、N＋有机肥和N＋秸秆6个不同施肥处理0～20cm土层土壤有效硼含量与肥料定位研究年限呈r=0．8094～0．8847的正相关关系，且不同施肥处理土壤有效硼含量均增加，为试验基础数值的2．9-4．7倍。各处理土壤有效硼含量依次为N＋有机肥处理〉N、P配施处理〉N＋秸秆处理〉单施N肥处理〉N、P、K配施处理〉无肥处理。N、P、K配施处理在获得较高产量的同时，有效硼累积较少。耕作、施肥等是影响土壤有效硼累积的重要因素。

The effects of long-term located fertilization on the available boron content of soil were studied. The results show that the available boron contents in 0 - 20cm soil layers of the six different fertilization treatments including N, NP, NPK, N ＋ organic fertilizer, N ＋ straw and no fertilizer show a direct correlation to the years of the localized fertilizer study with the coefficient r = 0. 8094 - 0. 8847. The different fertilization treatments all give an increased available boron contents, which are 2.9- 4.7 times of the basic values of the experiments, and come in the order of N ＋ organic fertilizer 〉 NP 〉 N ＋ straw〉 N 〉 NPK 〉 no fertilizer. Fertilization combined with NPK helps to win a relatively higher yield, in addition, less available boron is found to be accumulated. Farming and fertilization are the key factors affecting the accumulation of available boron in soil.