Dong Zhiqiang, Liu Yang, Li Minghua, Ci Baoxia, Lu Xi, Feng Xiaokang, Wen Shuai, Ma Fuyu
School of Agriculture, Shihezi University, Shihezi, 832003, Xinjiang, People's Republic of China.
Guiyang Healthcare Vocational University, Guiyang, 550081, Guizhou, People's Republic of China.
Sci Rep. 2023 Aug 31;13(1):14287. doi: 10.1038/s41598-023-40620-9.
In order to elucidate the effects of different nitrogen (N), phosphorus (P), and potassium (K) fertilization timing sequences management on nutrient absorption and utilization in drip irrigation cotton, field experiments were conducted from 2020 to 2021. There are six timing sequences management methods for NPK fertilization (S1-S6: 1/3Time N-1/3Time PK-1/3Time W, 1/3Time PK-1/3Time N-1/3Time W, 1/2Time NPK-1/2Time W, 1/4Time W-1/4Time N-1/4Time PK-1/4Time W, 1/3Time W-1/3Time NPK-1/3Time W), among which S6 is the current management method for field fertilization timing sequences, and S7 is the non N. The results showed that during the main growth stage, S5 accumulated more nitrate nitrogen (NO-N) and ammonium nitrogen (NH-N) content in soil between 20 and 40 cm, and accumulated more available phosphorus content in soil between 5-15 cm and 15-25 cm, S5 reducing N leaching and increasing P mobility. It is recommended to change the timing sequences management method of NPK fertilization for drip irrigation cotton to 1/4Time W-1/4Time PK-1/4Time N-1/4Time W, which is beneficial for plant nutrient absorption and utilization while reducing environmental pollution.
为阐明不同氮（N）、磷（P）、钾（K）施肥时间序列管理对滴灌棉花养分吸收和利用的影响，于2020年至2021年进行了田间试验。氮磷钾施肥有六种时间序列管理方法（S1 - S6：1/3时间施N - 1/3时间施PK - 1/3时间不施肥，1/3时间施PK - 1/3时间施N - 1/3时间不施肥，1/2时间施NPK - 1/2时间不施肥，1/4时间不施肥 - 1/4时间施N - 1/4时间施PK - 1/4时间不施肥，1/3时间不施肥 - 1/3时间施NPK - 1/3时间不施肥），其中S6是目前田间施肥时间序列的管理方法，S7是不施氮肥。结果表明，在主要生长阶段，S5处理在20至40厘米土层积累了更多的土壤硝态氮（NO₃-N）和铵态氮（NH₄-N）含量，在5 - 15厘米和15 - 25厘米土层积累了更多的有效磷含量，S5处理减少了氮淋失并提高了磷的移动性。建议将滴灌棉花氮磷钾施肥时间序列管理方法改为1/4时间不施肥 - 1/4时间施PK - 1/4时间施N - 1/4时间不施肥，这有利于植株养分吸收和利用，同时减少环境污染。
