Effect of Total Rape Straw Returning with Reduced Potassium Fertilizer on Tiller and Yield of Hybrid Rice
TANG Baoguo
TAO Shishun
ZHANG Rongping
DUAN Zhuanning
Abstract：In order to define the feasibility of cultivation of hybrid rice under rape straw returning with reduced potassium fertilizer in northeast Sichuan,field experiment was carried out with 10 hybrid rice varieties as materials.Under the condition of rape straw returned to field,the effect of 3 potassium fertilizer(K2O) treatments[treatment 1:high K(135.0 kg/ha),which was the local potassium amount,treatment 2: low K(67.5 kg/ha) and treatment 3:no K(0 kg/ha)]on the tiller and yield of hybrid rice.The results showed that,under the three treatments of potassium fertilizer,there was no significant difference in the tiller number;only a few varieties had significant differences in the spike rate,yield and yield composition factors,most varieties had no significant difference.The reaction of different varieties to potassium application was as follows: under no K and low K treatments,there was no significant difference in the yield of 7 varieties with high K treatment;the yield of the 2 varieties(FYou498 and Nei5YouH25) were significantly lower than that of the high K treatment,decreased by 10.31%,4.53% and 7.79%,4.29% respectively;the yield of 1 variety(Jing3You177) was significantly higher than that of the high K treatment with increase rate of 5.28% and 3.61%;the average yield of 10 hybrid rice varieties had no significant difference between the 3 treatments.The above results indicated that hybrid rice could be cultivated under rape straw returning with reduced potassium fertilizer in northeast Sichuan.
Keywords：hybrid ricestraw returning to fieldpotassium reduction cultivationyieldtiller
Publication Date：2017-03-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 29-33 )