【摘要】：以第一年投產(chǎn)的“摩爾多瓦”葡萄樹(shù)為試驗(yàn)材料,采用三元二次飽和D-最優(yōu)設(shè)計(jì),結(jié)合田間試驗(yàn)、土培模擬試驗(yàn)及田間后效試驗(yàn),以探究施加石灰石粉、AM菌劑、營(yíng)養(yǎng)調(diào)節(jié)劑三種外源土壤調(diào)理劑后,在廣西富硒土上原位生產(chǎn)富硒葡萄的可能性;并探討三種改良劑對(duì)土壤各形態(tài)硒的影響以及各形態(tài)硒與葡萄果實(shí)硒間相互作用機(jī)制;同時(shí)也改進(jìn)廣西葡萄園區(qū)土壤硒連續(xù)提取方法,主要研究結(jié)果如下:1、廣西葡萄園區(qū)土硒連續(xù)提取最佳方案為:2g用土量,土液比為1:20,水溶態(tài)硒浸提劑為0.25MKCl(22℃),可溶態(tài)硒及碳酸鹽結(jié)合態(tài)硒浸提劑為0.7M KH_2PO_4(pH=5.0),鐵錳結(jié)合態(tài)硒浸提劑為4.5M HCl,有機(jī)結(jié)合態(tài)硒與硫化物硒浸提劑為5%K_2S_2O_8 8ml+(1:1)HNO_3 2ml,殘?jiān)鼞B(tài)硒浸提劑為HF:HNO_3:HClO4(1:1:1)10ml。2、田間試驗(yàn)表明,當(dāng)施加石灰石粉、AM菌劑、營(yíng)養(yǎng)調(diào)節(jié)劑后(除處理1外),葡萄果實(shí)硒含量提高了 1.1～1.8倍,當(dāng)它們施用量分別為2400kg/ha、69kg/ha、39.98kg/ha時(shí),根據(jù)模型顯示葡萄果實(shí)含硒含量可為11.56ug/kg,可達(dá)到富硒果蔬標(biāo)準(zhǔn)。3、試驗(yàn)土壤各形態(tài)硒含量順序?yàn)橛袡C(jī)機(jī)-硫化物結(jié)合態(tài)殘?jiān)鼞B(tài)鐵錳結(jié)合態(tài)可溶態(tài)及碳酸鹽結(jié)合態(tài)水溶態(tài)。4、田間后效試驗(yàn)表明:葡萄含硒量各生育期含量順序?yàn)槌墒炱谥谂虼笃?而常規(guī)條件下,膨大期最大,成熟期與著色期含量相近。因此,以石灰石粉、AM菌劑和營(yíng)養(yǎng)調(diào)節(jié)劑等外源物質(zhì)可作為生產(chǎn)“摩爾多瓦”富硒葡萄新型富硒手段。
[Abstract]:Taking the "Moldova" grape tree put into production in the first year as the experimental material, using the ternary secondary saturated D- optimal design, combining with the field experiment, soil culture simulation test and field after-effect experiment, the application of limestone powder AM bacteria agent was investigated. The possibility of in situ production of selenium-enriched grape on the selenium-rich soil of Guangxi after three exogenous soil conditioners were studied, and the effects of the three modifiers on the selenium in different forms of soil and the interaction mechanism between each form of selenium and selenium in grape fruit were discussed. At the same time, it also improved the continuous extraction method of soil selenium in the grape garden of Guangxi. The main results are as follows: 1. The best scheme for continuous extraction of soil selenium in the grape garden of Guangxi is: 2 g soil quantity. Soil-liquid ratio is 1: 20, water soluble selenium extractant is 0.25MKCl (22 鈩，

本文編號(hào)：2235895