Evaluating stability of durative yield increasing effect of potassium(K) fertilization and straw recycling on crop yields by yield increase stability coefficient (YISC)
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DOI：10.7606/j.issn.1000-7601.2010.05.09
Key Words: stability of durative yield increasing  yield increase stability coefficient (YSIC)  potassium (K) fertilization and straw recycling  wheat  corn
Author NameAffiliation
XING Suli Agricultural Resources and Environment Institute，Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei 050051, China 
LIU Mengchao Agricultural Resources and Environment Institute，Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei 050051, China 
HE Ping Agricultural Resources and Environment Institute，Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei 050051, China 
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Abstract:
      According to long-term sited fertilization experiment, this paper put forward yield increase stability coefficient (YISC) index, in order to study and quantitative analyze stability of durative yield-increasing effect of potassium(K) fertilization and straw recycling on wheat and corn yields. The experiment includes 4 treatments as: (1) CK, only providing N and P fertilizer; (2) CK + wheat straw recycling; (3) Optimum rate of N, P and K fertilizer; (4) N, P and K fertilization + wheat straw recycling. The results show that YISC is available for evaluating stable yield-increasing effect of the fertilization design. By quantitative analysis for long-term yield-increasing effect of different fertilization designs we know that long-term K fertilization and straw recycling can both increase grain yield and stability of durative yield increasing.
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