Two Tahiti lime （Citrus latifolia Tan.） experiments were carried out to evaluate the performance of eight standard rootstocks on two different soil locations at Tecoman Colima, Mexico. Rootstocks were selected by th...Two Tahiti lime （Citrus latifolia Tan.） experiments were carried out to evaluate the performance of eight standard rootstocks on two different soil locations at Tecoman Colima, Mexico. Rootstocks were selected by their tolerance to Citrus tristeza virus （CTV） and acceptable adaptation to semi-add hot tropics environment. The first trial was planted in ＂Cerrito de Aguilar＂ （CA） location which had sandy-loam soil with a fluctuant water table at 100 cm depth. The second experiment was planted in ＂Crucero Tecoman＂ （CT） on a sandy deep soil with no water table restriction. At CT location the best Tahiti lime growth, yield and fruit quality were observed on Alemow rootstock. The same combination at CA showed a poor performance and was affected by diseases due to high moisture conditions by the superficial water table. Taiwanica, Swingle citrumelo and Rangpur lime rootstocks were less productive than Alemow, but showed a good adaptation and acceptable yield on both soil conditions. Among them, Swingle citrumelo was a promising rootstock because it showed standard tree growth, good yield and excellent fruit quality. Swingle citrumelo also showed an acceptable performance on soil with high presence ofPhytophthora sp. and moderate levels of calcium carbonate （near to 3,500 ppm）. Taiwanica and Rangpur lime performed well during the six years of the experiment, but trees began to be affected by root diseases. Better performance of most Tahiti lime/rootstocks were found on sandy depth soil than on superficial wet soils.展开更多
To find Jatropha curcas L. accessions with characteristics suitable for rootstock plants, 11 selected accessions were analyzed in response to heavy soil. Six-week-old of jatropha were grown in 11 L ofentisols （M1） a...To find Jatropha curcas L. accessions with characteristics suitable for rootstock plants, 11 selected accessions were analyzed in response to heavy soil. Six-week-old of jatropha were grown in 11 L ofentisols （M1） and grumusols （M2） soil for 10 weeks, while andosols soil richer in organic carbon were used as control media （M0）. Growth of shoot and primary as well as secondary roots were observed during and at the end of the experiment. Macro and micro nutrient uptake was also analyzed at the end of experiment. Ml and M2 caused dramatically reduction of roots as well as shoot growth of all accessions. The reduction of growth component was in accordance to all nutrient uptakes except Ca and Mg. The data showed that type of soil was one of important factors influencing growth and development of J. curcas. There were 4 accessions i.e. Sumatra-l （S1）, Sumatra-2 （S2）, Java-3 （J3） and Java-2 （J2） which had better roots and shoot characteristics that were potential to be used as rootstock plants.展开更多
文摘Two Tahiti lime （Citrus latifolia Tan.） experiments were carried out to evaluate the performance of eight standard rootstocks on two different soil locations at Tecoman Colima, Mexico. Rootstocks were selected by their tolerance to Citrus tristeza virus （CTV） and acceptable adaptation to semi-add hot tropics environment. The first trial was planted in ＂Cerrito de Aguilar＂ （CA） location which had sandy-loam soil with a fluctuant water table at 100 cm depth. The second experiment was planted in ＂Crucero Tecoman＂ （CT） on a sandy deep soil with no water table restriction. At CT location the best Tahiti lime growth, yield and fruit quality were observed on Alemow rootstock. The same combination at CA showed a poor performance and was affected by diseases due to high moisture conditions by the superficial water table. Taiwanica, Swingle citrumelo and Rangpur lime rootstocks were less productive than Alemow, but showed a good adaptation and acceptable yield on both soil conditions. Among them, Swingle citrumelo was a promising rootstock because it showed standard tree growth, good yield and excellent fruit quality. Swingle citrumelo also showed an acceptable performance on soil with high presence ofPhytophthora sp. and moderate levels of calcium carbonate （near to 3,500 ppm）. Taiwanica and Rangpur lime performed well during the six years of the experiment, but trees began to be affected by root diseases. Better performance of most Tahiti lime/rootstocks were found on sandy depth soil than on superficial wet soils.
文摘To find Jatropha curcas L. accessions with characteristics suitable for rootstock plants, 11 selected accessions were analyzed in response to heavy soil. Six-week-old of jatropha were grown in 11 L ofentisols （M1） and grumusols （M2） soil for 10 weeks, while andosols soil richer in organic carbon were used as control media （M0）. Growth of shoot and primary as well as secondary roots were observed during and at the end of the experiment. Macro and micro nutrient uptake was also analyzed at the end of experiment. Ml and M2 caused dramatically reduction of roots as well as shoot growth of all accessions. The reduction of growth component was in accordance to all nutrient uptakes except Ca and Mg. The data showed that type of soil was one of important factors influencing growth and development of J. curcas. There were 4 accessions i.e. Sumatra-l （S1）, Sumatra-2 （S2）, Java-3 （J3） and Java-2 （J2） which had better roots and shoot characteristics that were potential to be used as rootstock plants.
