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Chinese Agricultural Science Bulletin ›› 2017, Vol. 33 ›› Issue (13): 26-36.doi: 10.11924/j.issn.1000-6850.casb17020033

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Effects of Different NPK Rates on Nutrient Absorption andFertilizer Use Efficiency of Red Kidney Beans

Jin Fansheng1, Han Yanlong1, Li Xiaoping2, Li Jie1, Li Haijin1   

  1. (1Research Center for Dryland Agriculture, Shanxi Academy of Agricultural Sciences, Taiyuan 030031;2College of Resources and Environmental Sciences, Shanxi Agricultural University, Taigu Shanxi 030801)
  • Received:2017-02-13 Revised:2017-03-28 Accepted:2017-02-24 Online:2017-05-16 Published:2017-05-16

Abstract: To provide a theoretical basis of appropriate and rational fertilization for field planting and highlyefficient production of red kidney bean, the authors studied the effects of different NKP rates on nutrient absorption and fertilizer use efficiency of red kidney bean. The“3414” field fertilizer experiment was conducted using‘Yingguohong’as material. The results showed that N, P, K absorptive amount by red kidney bean during the whole growth period had rapid accumulation in the early stage, slow increase in the middle stage and decrease in the late stage; the senescence and drop of leaf were the main reasons for the decreasing amount of nutrient absorption. The nutrient absorption of red kidney bean was promoted most under treatment 6 (N2P2K2), its absorption amount of N, P and K was 169.31, 42.58 and 135.92 kg/hm2, respectively. The nutrient absorption of all organs were different, that in leaves showed a rapid rate in the early period, remained stable in the middle period and declined in the late period; N absorption amount in stems followed the rule of “increase- decrease- increase”, P, K uptake increased first and then decreased; P, K uptake in pod shell increased rapidly in the early stage, but were later transferred to pea and decreased; on the contrary, P, K uptake in pea was low at first, but later much larger than that in pod shell. The dynamic nutrient distribution in different organs of red kidney bean showed that the nutrient distribution in leaves decreased gradually with the growth, that in stems increased first and then decreased, and that in pod shells and peas showed an increasing trend. The absorption of the three nutrients in red kidney bean were interactive and the interdependence was relatively high; to form 100 kg peas, the absorption amount of N, P2O5 and K2O was 5.49, 1.33 and 4.9 kg, respectively; the average nutrient absorption ratio was 1:0.24:0.89. The fertilizer use efficiency of NPK did not have a significant rule with the fertilizer application amount, the maximum utilization rate of NPK reached 46%, 11.04% and 66.06%, respectively in the season, and the relative absorption rate was up to 100.25%, 90.23% and 115.21%, respectively.

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