The intercropping system of tree with soybean in juvenile plantations, as a short-term practice, was applied at Lao Shan Experimental Station in Mao＇er Shan Forest of Northeast Forestry University, Harbin, China. The...The intercropping system of tree with soybean in juvenile plantations, as a short-term practice, was applied at Lao Shan Experimental Station in Mao＇er Shan Forest of Northeast Forestry University, Harbin, China. The larch （Larix gmelinii）lsoybean （Glycine max.） and ash （Fraxinus mandshurica） intercropping systems were studied in the field to assess the effects of the intercropping on soil physicochemical properties. The results showed that soil physical properties were improved after soybean intercropping with larch and ash in one growing season. The soil bulk density in larch/soybean and ash/soybean systems was 1.112 g·cm^-3 and 1.058 g·cm^ 3, respectively, which was lower than that in the pure larch or ash plantation without intercropping. The total soil porosity also increased after intercropping. The organic matter amount in larch/soybean system was 1.77 times higher than that in the pure larch plantation, and it was 1.09 times higher in ash/soybean system than that in the pure ash plantation. Contents of total nitrogen and hydrolyzable nitrogen in larch/soybean system were 4.2% and 53.0% higher than those in the pure larch stand. Total nitrogen and hydrolyzable nitrogen contents in ash/soybean system were 75.5% and 3.3% higher than those in the pure ash plantation. Total phosphorus content decreased after intercropping, while change of available phosphorus showed an increasing trend. Total potassium and available potassium contents in the larch/soybean system were 0.6% and 17.5% higher than those in the pure larch stand. Total potassium and available potassium contents in the ash/soybean system were 56.4% and 21.8% higher than those in the oure ash plantation.展开更多
Field trial was carried out in the Soudano-Guinean zone of Cameroon to investigate the effect of intercropping systems of castor bean with common bean and maize on their growth and yield. Randomized complete block des...Field trial was carried out in the Soudano-Guinean zone of Cameroon to investigate the effect of intercropping systems of castor bean with common bean and maize on their growth and yield. Randomized complete block design with three replications was used and five treatments： castor bean in monoculture or in association with common beans or maize, common bean in monoculture and in association with castor bean, maize in monoculture and in association with castor bean. The growth parameters and seed yield were evaluated. Castor beans associated with either maize or common bean grew faster compared to the monoculture system. In addition common bean exhibited fast growth and high seed yield when associated to castor bean, while, no significant difference was observed for maize. In conclusion, the culture of castor bean in association with common bean or maize is advantageous for the peasants in the Adamawa Cameroon region.展开更多
文摘The intercropping system of tree with soybean in juvenile plantations, as a short-term practice, was applied at Lao Shan Experimental Station in Mao＇er Shan Forest of Northeast Forestry University, Harbin, China. The larch （Larix gmelinii）lsoybean （Glycine max.） and ash （Fraxinus mandshurica） intercropping systems were studied in the field to assess the effects of the intercropping on soil physicochemical properties. The results showed that soil physical properties were improved after soybean intercropping with larch and ash in one growing season. The soil bulk density in larch/soybean and ash/soybean systems was 1.112 g·cm^-3 and 1.058 g·cm^ 3, respectively, which was lower than that in the pure larch or ash plantation without intercropping. The total soil porosity also increased after intercropping. The organic matter amount in larch/soybean system was 1.77 times higher than that in the pure larch plantation, and it was 1.09 times higher in ash/soybean system than that in the pure ash plantation. Contents of total nitrogen and hydrolyzable nitrogen in larch/soybean system were 4.2% and 53.0% higher than those in the pure larch stand. Total nitrogen and hydrolyzable nitrogen contents in ash/soybean system were 75.5% and 3.3% higher than those in the pure ash plantation. Total phosphorus content decreased after intercropping, while change of available phosphorus showed an increasing trend. Total potassium and available potassium contents in the larch/soybean system were 0.6% and 17.5% higher than those in the pure larch stand. Total potassium and available potassium contents in the ash/soybean system were 56.4% and 21.8% higher than those in the oure ash plantation.
文摘Field trial was carried out in the Soudano-Guinean zone of Cameroon to investigate the effect of intercropping systems of castor bean with common bean and maize on their growth and yield. Randomized complete block design with three replications was used and five treatments： castor bean in monoculture or in association with common beans or maize, common bean in monoculture and in association with castor bean, maize in monoculture and in association with castor bean. The growth parameters and seed yield were evaluated. Castor beans associated with either maize or common bean grew faster compared to the monoculture system. In addition common bean exhibited fast growth and high seed yield when associated to castor bean, while, no significant difference was observed for maize. In conclusion, the culture of castor bean in association with common bean or maize is advantageous for the peasants in the Adamawa Cameroon region.
