Studies on the reduction of phosphorus compounds from animal waste by decreasing of phytate concentration in soybean grain.

大豆广泛用于牲畜饲料的原料中。然而，大豆籽粒中特别含有植酸，植酸是籽粒中主要的磷储存化合物，占籽粒总磷的80%以上。植酸在猪、鸡和人类等单胃动物中几乎是不能消化的，所以植酸要通过消化系统。因此，家禽和鸡粪中含有大量的磷，因此，在谷物消费地区，磷被流失到环境中，这可能是导致土壤假种皮水中磷浓度过高的原因之一。提高籽粒中磷的有效性的一个有效方法是增加籽粒中的非植酸P(PA)化合物，如无机P和/或有机P化合物，而不是PA。本研究旨在提高大豆植株对磷的营养利用率。对70个大豆品种进行了分析，以确定植酸磷含量高低的品种。70个品种的PA含量为14.7~25.6 mg/gDW，占全P的比例为55~90%。而降低大豆籽粒PA和增加无机P的突变株的PA-P浓度为1.99 mg/gDW。籽粒中磷酸盐占全磷浓度的百分比为16%。低植酸突变体的蛋白质、钙、镁、钾、氮、铁、锌含量与其他70个品种相同。这些结果表明，低植酸突变体将是减少动物粪便中植酸含量的有用工具，有助于当前改善农业生产中磷的管理和努力减少这种生产对环境的影响。

Soybean is widely used in the raw materials of livestock fodder. However, soybean grains is particular contain phytic acid (phytate), which is the major phosphorus storage compound in grains and account for up to 80% of the total grain phosphorus (P). Phytate is almost indigestible in monogastric animals such as pigs, chickens, and humans, so phytate passes through the digestive system. Therefore, poultry and chicken feces contained large amounts of P. As a result, P is lost to the environment in cereal-consuming regions, where it may contribute to excessive P concentration in soil aril water. One effective method the increase the availability of P in grain is by increasing the non-phytic acid P (PA) compounds such as inorganic P and/or organic P compounds instead of PA in grain. This study was conducted to improve the nutritional availability of P in a soybean plants. Analysis of 70 soybean cultivars was conducted to identify cultivars that showing either high or low concentration of phytic acid-P. The PA concentration in 70 cultivars ranged 14.7 to 25.6 mg/g DW, and PA concentration to total P ranged from 55 to 90 %. However, the PA-P concentration in mutation that reduce soybean seed PA and increase inorganic P was 1.99 mg/g DW. And also percentage in PA to total P concentration was 16% in seed. Protein, Ca,Mg,K,N,Fe and Zn concentration in low phytic acid-mutant was same as the other 70 cultivars. These results indicated that low phytic acid-mutant would be useful tool in reducing the amount of phytic acid in animal waste, contributing to the current efforts to improve the management of P in agricultural production and efforts to reduce the impact of this production on the environment.