为了探明磷矿粉在油菜-水稻-水稻轮作制中的有效施用方法,在一个发育于第四纪红色黏土的酸性水稻土上进行了3 a田间试验。试验结果显示:施用磷肥对油菜的增产效应显著比水稻大。当将过磷酸钙P 120 kg hm-2分施于油菜、早稻和晚稻,而将...为了探明磷矿粉在油菜-水稻-水稻轮作制中的有效施用方法,在一个发育于第四纪红色黏土的酸性水稻土上进行了3 a田间试验。试验结果显示:施用磷肥对油菜的增产效应显著比水稻大。当将过磷酸钙P 120 kg hm-2分施于油菜、早稻和晚稻,而将磷矿粉P120 kg hm-2集中施于油菜时,油菜的增产效应:Gafsa磷矿粉>昆阳磷矿粉>过磷酸钙;早稻的增产效应:Gafsa磷矿粉≈昆阳磷矿粉>过磷酸钙;晚稻的增产效应:过磷酸钙>Gafsa磷矿粉>昆阳磷矿粉。Gafsa磷矿粉和昆阳磷矿粉对油菜、早稻和晚稻的相对农学有效性分别为108.7%、105.0%、99.6%和89.4%、104.8%、97.1%。增加磷矿粉用量或将磷矿粉与过磷酸钙混合分施于3季,并未增加油菜和水稻的产量。油菜收获后的耕层土壤有效磷含量高于水稻收获后的耕层土壤有效磷含量。耕层土壤有效磷含量与油菜相对产量之间呈显著的正相关,而与水稻相对产量之间则无显著的相关性。展开更多
The concentrations of N, P, K, Ca and Mg in different organs of Phyllostachys pubescens with in sequence of age and the amount of soil nutrients were analyzed. The results showed that the content of four nutrition ele...The concentrations of N, P, K, Ca and Mg in different organs of Phyllostachys pubescens with in sequence of age and the amount of soil nutrients were analyzed. The results showed that the content of four nutrition elements(N, P, Ca, Mg) in different organs were in the order as: leaf > branch > stem; while for K: leaf >stem >branch. The abundance of different elements in leaf, in branch and in stem respectively ranged as: N>K>Mg>P>Ca, K>N>Mg>P>Ca and K>N>Mg>Ca>P. The nutrition elements in various organs of P. pubescens were interrelated one another at some extent, significant( P <0 05) or great significant correlation ( P <0 01)existed between eleven pairs nutrient elements contents out of total thirty pairs of nutrient elements. The productivity of the woods in on_year was much higher than that in off_year, while the content of N, P and K in leaf was much higher in off_year. The nutrition in bamboo were generally correlated to nutrients of soils, eg, nitrogen content in leaf had a significant relationship with organic matter, total nitrogen, available nitrogen and available potassium in soil, phosphorus content in leaf had a strong relationship with organic matter and available nitrogen in soil, however, only good relationships in stem were found between nitrogen content and organic matter, available potassium in soil. Potassium content in branch were negatively correlated to organic matter, total nitrogen and available nitrogen in soil.展开更多
文摘为了探明磷矿粉在油菜-水稻-水稻轮作制中的有效施用方法,在一个发育于第四纪红色黏土的酸性水稻土上进行了3 a田间试验。试验结果显示:施用磷肥对油菜的增产效应显著比水稻大。当将过磷酸钙P 120 kg hm-2分施于油菜、早稻和晚稻,而将磷矿粉P120 kg hm-2集中施于油菜时,油菜的增产效应:Gafsa磷矿粉>昆阳磷矿粉>过磷酸钙;早稻的增产效应:Gafsa磷矿粉≈昆阳磷矿粉>过磷酸钙;晚稻的增产效应:过磷酸钙>Gafsa磷矿粉>昆阳磷矿粉。Gafsa磷矿粉和昆阳磷矿粉对油菜、早稻和晚稻的相对农学有效性分别为108.7%、105.0%、99.6%和89.4%、104.8%、97.1%。增加磷矿粉用量或将磷矿粉与过磷酸钙混合分施于3季,并未增加油菜和水稻的产量。油菜收获后的耕层土壤有效磷含量高于水稻收获后的耕层土壤有效磷含量。耕层土壤有效磷含量与油菜相对产量之间呈显著的正相关,而与水稻相对产量之间则无显著的相关性。
文摘The concentrations of N, P, K, Ca and Mg in different organs of Phyllostachys pubescens with in sequence of age and the amount of soil nutrients were analyzed. The results showed that the content of four nutrition elements(N, P, Ca, Mg) in different organs were in the order as: leaf > branch > stem; while for K: leaf >stem >branch. The abundance of different elements in leaf, in branch and in stem respectively ranged as: N>K>Mg>P>Ca, K>N>Mg>P>Ca and K>N>Mg>Ca>P. The nutrition elements in various organs of P. pubescens were interrelated one another at some extent, significant( P <0 05) or great significant correlation ( P <0 01)existed between eleven pairs nutrient elements contents out of total thirty pairs of nutrient elements. The productivity of the woods in on_year was much higher than that in off_year, while the content of N, P and K in leaf was much higher in off_year. The nutrition in bamboo were generally correlated to nutrients of soils, eg, nitrogen content in leaf had a significant relationship with organic matter, total nitrogen, available nitrogen and available potassium in soil, phosphorus content in leaf had a strong relationship with organic matter and available nitrogen in soil, however, only good relationships in stem were found between nitrogen content and organic matter, available potassium in soil. Potassium content in branch were negatively correlated to organic matter, total nitrogen and available nitrogen in soil.
