Aiming at high cost and low efficiency of conventional branch bending method in the modern intensive planting and labor-saving cultivation mode of young pear trees,this paper provides a new branch bending method with ...Aiming at high cost and low efficiency of conventional branch bending method in the modern intensive planting and labor-saving cultivation mode of young pear trees,this paper provides a new branch bending method with wide source of raw materials,cheap price and simple operation,which is also suitable for the management of low-age branches in the process of high grafting and upgrading of traditional big trees.展开更多
In view of the deficiencies of training technologies during constructing pear orchards by modern simplified dense-planting cultivation with ordinary pear seedlings widely used in production,a simple and easy-to-operat...In view of the deficiencies of training technologies during constructing pear orchards by modern simplified dense-planting cultivation with ordinary pear seedlings widely used in production,a simple and easy-to-operate training method was proposed,mainly including constructing fence nets,determining low main trunks,leaving buds at the northwest position,multiple bud removal,winding and notching,simplified branch supporting,and simplified branch pulling.展开更多
The leaf area-to-fruit ratio(LAFR)is an important factor affecting fruit quality.Previous studies on LAFR have provided some recommendations for optimal values.However,these recommendations have been quite broad and l...The leaf area-to-fruit ratio(LAFR)is an important factor affecting fruit quality.Previous studies on LAFR have provided some recommendations for optimal values.However,these recommendations have been quite broad and lack effectiveness during the fruit thinning period.In this study,data on the LAFR and fruit quality of pears at 5 stages were collected by continuously girdling bearing branches throughout the entire fruit development process.Five different clustering algorithms,including KMeans,Agglomerative clustering,Spectral clustering,Birch,and Spectral biclustering,were employed to classify the fruit quality data.Agglomerative clustering yielded the best results when the dataset was divided into 4 clusters.The least squares method was utilized to fit the LAFR corresponding to the best quality cluster,and the optimal LAFR values for 28,42,63,91,and 112 days after flowering were 12.54,18.95,23.79,27.06,and 28.76 dm2(the corresponding leaf-to-fruit ratio values were 19,29,36,41,and 44,respectively).Furthermore,field verification experiments demonstrated that the optimal LAFR contributed to improving pear fruit quality,and a relatively high LAFR beyond the optimum value did not further increase quality.In summary,we optimized the LAFR of pear trees at different stages and confirmed the effectiveness of the optimal LAFR in improving fruit quality.Our research provides a theoretical basis for managing pear tree fruit load and achieving high-quality,clean fruit production.展开更多
In view of the short blooming period of pear tree crossbreeding and the complexity of pollination process, a method that can improve the efficiency of crossbreeding of pear trees was provided. Meanwhile, this method c...In view of the short blooming period of pear tree crossbreeding and the complexity of pollination process, a method that can improve the efficiency of crossbreeding of pear trees was provided. Meanwhile, this method can also be applied to the study of pollen xenia effect, pollination tree selection and pure pollen collection in pear tree cultivation.展开更多
基金Technology Innovation Special Project of Hebei Academy of Agriculture and Forestry Sciences(2022KJCXZX-CGS-7,2023KJCXZX-CGS-11)Key Research and Development Program of Hebei Province(21326308D-1-2)+1 种基金Hebei Agriculture Research System(HBCT2024170406)China Agricultural(Pear)Research System(CARS-28-27).
文摘Aiming at high cost and low efficiency of conventional branch bending method in the modern intensive planting and labor-saving cultivation mode of young pear trees,this paper provides a new branch bending method with wide source of raw materials,cheap price and simple operation,which is also suitable for the management of low-age branches in the process of high grafting and upgrading of traditional big trees.
基金Supported by Innovation Engineering Project of Hebei Academy of Agriculture and Forestry Sciences(2022KJCXZX-CGS-7)Key R&D Program of Hebei Province(21326308D-1-2)China Agriculture Research System of MOF and MARA(CARS-28-27)。
文摘In view of the deficiencies of training technologies during constructing pear orchards by modern simplified dense-planting cultivation with ordinary pear seedlings widely used in production,a simple and easy-to-operate training method was proposed,mainly including constructing fence nets,determining low main trunks,leaving buds at the northwest position,multiple bud removal,winding and notching,simplified branch supporting,and simplified branch pulling.
基金financially supported by the Jiangsu Agricultural Scienceand Technology Innovation Fund[CX(22)2025 and CX(23)1011]Achievement Transformation Fund Project of Sanya Institute of Nanjing Agricultural University(NAUSY-CG-YB06)China Agriculture Research System-Pear(CARS-28).
文摘The leaf area-to-fruit ratio(LAFR)is an important factor affecting fruit quality.Previous studies on LAFR have provided some recommendations for optimal values.However,these recommendations have been quite broad and lack effectiveness during the fruit thinning period.In this study,data on the LAFR and fruit quality of pears at 5 stages were collected by continuously girdling bearing branches throughout the entire fruit development process.Five different clustering algorithms,including KMeans,Agglomerative clustering,Spectral clustering,Birch,and Spectral biclustering,were employed to classify the fruit quality data.Agglomerative clustering yielded the best results when the dataset was divided into 4 clusters.The least squares method was utilized to fit the LAFR corresponding to the best quality cluster,and the optimal LAFR values for 28,42,63,91,and 112 days after flowering were 12.54,18.95,23.79,27.06,and 28.76 dm2(the corresponding leaf-to-fruit ratio values were 19,29,36,41,and 44,respectively).Furthermore,field verification experiments demonstrated that the optimal LAFR contributed to improving pear fruit quality,and a relatively high LAFR beyond the optimum value did not further increase quality.In summary,we optimized the LAFR of pear trees at different stages and confirmed the effectiveness of the optimal LAFR in improving fruit quality.Our research provides a theoretical basis for managing pear tree fruit load and achieving high-quality,clean fruit production.
基金Supported by HAAFS Science and Technology Innovation Special Project(2022KJCXZX-CGS-7)the Key Research and Development Program of Hebei Province(21326308D-1-2)Hebei Agriculture Research System(HBCT 2024170406)。
文摘In view of the short blooming period of pear tree crossbreeding and the complexity of pollination process, a method that can improve the efficiency of crossbreeding of pear trees was provided. Meanwhile, this method can also be applied to the study of pollen xenia effect, pollination tree selection and pure pollen collection in pear tree cultivation.
