宁夏引黄灌区春小麦氮磷钾需求及化肥减施潜力
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王西娜,于金铭,谭军利,张佳群,魏照清,王朝辉
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Requirement of Nitrogen, Phosphorus and Potassium and Potential of Reducing Fertilizer Application of Spring Wheat in Yellow River Irrigation Area of Ningxia
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WANG XiNa,YU JinMing,TAN JunLi,ZHANG JiaQun,WEI ZhaoQing,WANG ZhaoHui
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表8 不同施钾量下春小麦产量、生物量、产量构成因素及养分含量
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Table 8 Biomass, grain yield and its components of spring wheat and concentrations of N, P and K in grain at different K2O rates
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| 处理代码Treatment | 施钾量
K2O rate (kg·hm-2) | 生物量
Biomass (kg·hm-2) | 籽粒产量
Grain yield (kg·hm-2) | 收获指数
Harvest index (%) | 公顷穗数Ears per hectare
(×104·hm-2) | 穗粒数
Number of grains per ear | 千粒重
1000 grains weight
(g) | 籽粒含氮量
N concentration in grain (g·kg-1) | 籽粒含磷量P concentration in grain (g·kg-1) | 籽粒含钾量
K concentration in grain (g·kg-1) | | K0 | 0 | 19820±145a | 5900±253a | 29.8±0.01a | 465±74a | 33.0±3.1a | 47.3±1.2ab | 23.73±1.7a | 3.86±0.3a | 3.80±0.0a | | K1 | 30 | 19241±2220a | 5600±753a | 29.1±0.01a | 465±70a | 31.5±1.2ab | 47.0±0.3ab | 23.99±5.0a | 3.84±0.2a | 3.67±0.1a | | K2 | 60 | 18416±5133a | 5435±1425a | 29.6±0.01a | 451±81a | 31.6±3.7ab | 46.4±4.1b | 24.37±1.5a | 3.81±0.2a | 3.69±0.2a | | K3 | 75 | 17712±3650a | 5474±957a | 31.0±0.01a | 469±87a | 30.0±2.8b | 50.9±3.3a | 25.35±3.1a | 3.93±0.3a | 3.61±0.2a |
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