长期不同施肥方式对旱地轮作土壤养分和作物产量的影响

为明确黄土高原半干旱区不同施肥方式下旱地土壤养分和作物产量及其相互关系,筛选出农田最佳施肥管理措施,于2015—2018年进行田间试验,研究了9种不同施肥设置[有机肥配施磷肥(MP)、有机肥配施氮肥(MN)、磷钾肥配施(PK)、氮磷肥配施(NP)、种植作物不施肥(CK)、氮磷钾肥配施(NPK)、氮钾肥配施(NK)、有机...

Effects of different long|term fertilization on crop yield and soil nutrients under rotation planting in arid region

In this study, we aimed to investigate the effects of long|term fertilization on crop yield and nutrients with different fertilization treatments in a dryland crop rotation system on the Loess Plateau, and to facilitate the selection of the optimal farmland fertilization management approaches. Field experiments with nine fertilization treatments were carried out during 2015-2018. The different fertilization treatments increased soil nutrient content in the four consecutive years, with the M treatment exhibiting the most significant increase in soil organic carbon content at 112%, 107%, 101%, and 103%, in the four consecutive years, respectively, compared with the control (CK). The MN treatment exhibited the most significant increase in soil available nitrogen content, which increased by 155%, 167%, 157%, and 135%, respectively, compared with the CK. Furthermore, the MP treatment showed the most significant increase in soil available phosphorus content at 843%, 833%, 929%, and 935%, respectively, compared with the CK. In addition, the M treatment exhibited the most significant increases in soil available potassium at 124%, 126%, 121%, and 113%, respectively, compared with the CK. The different fertilizers significantly influenced crop yield; crop yield under the MNP treatment increased most significantly at 81%, 337%, 320%, and 239%, respectively, compared with the CK. Significant differences were obtained in the crop yield sustainability index among the different fertilization treatments, with the highest in the MNP treatment, followed by the MN treatment, and the lowest in the CK treatment. The findings of this study demonstrate that the combination of organic and chemical fertilizers improves crop yield, supplement soil nutrients, regulates the rate of nutrient release and its intensity, and meets the nutrient demands of crops over the entire growth period, as well as facilitates high and stable yields.