A Study On Several Producing Techniques Of Sophora Tonkinensis Gagnep Seed

Based on studying the habitat and observing blossoming and fruit bearing of wild Sophora tonkinensis, the author tested some key techniques on Sophora tonkinensis during its flowering and fruiting period, such as chemical regulation, pruning techniques, pest control, seed collection and preservation. The author concluded some high-yielding techniques of Sophora tonkinensis seeds and the major findings are as following:(1) Field survey of Sophora tonkinensis has been done in7sample plots located at Napo county, Jingxi county, Debao county, and Tiandong county of Guangxi Zhuang Autonomous Region. Wild Sophora tonkinensis were found at only three sample plots, namely, Longhe village of Napo county, Ande town of Jingxi county, and Zurong town of Debao county. The finding of the field survey is basically consistent with existent data. Apart from some area, wild Sophora tonkinensis is on the verge of extinction at most part of Guangxi.(2) Flowering and fruiting abilities of Sophora tonkinensis are closely related to its growing status. The stronger it grows, the more it flowers, and the more it pods.(3) Sophora tonkinensis blossoms in late April and florescence is about three months, while the first pod grows in mid-May. The blossom rate of wild plant is about20%, but the blossom rate increases to29.5%if the plant is transplanted at fertilized habitat. Therefore, it can be concluded that its blossom rate is related to soil fertility.(4) If transplanting in its native habitat, the podding rate of Sophora tonkinensis is only9.4%. The pod matures in about150days with a hard shell, green-yellowish peel and full and hard seeds inside. When the seed coat appears smooth and yellowish-brown, it’s time for harvest. It’s suggested to harvest pods in batches and mature pods should be harvested first.(5) If we cut the inflorescence of Sophora tonkinensis by one-third, one-half and two-thirds respectively, the seeds and the weight per thousand seed outnumber those of the controlled samples. The plants with one-half inflorescence cut have the most seeds, while the plants with two-thirds inflorescence cut have the heaviest seeds and highest germination rate per thousand.(6) If we spray fertilizer like GA3, NAA,6-BA, and Yunda-120during its growing and reproduction period, the fruit-set rates of these plants are all higher than the controlled sample, of which, the fruit-set rate of the plants receiving NAA25mg/L fertilization is11.0%, the highest of all. The weights per thousand seeds of all fertilized plants are a little heavier than those of controlled samples. (7) The primary pests during the growing and reproduction period of Sophora tonkinensis are EtiellazinckenellaTreitschke, Helicoverpa armigera Hubner and Lampides boescus Linne. These pests can be controlled by using1:1500liquid lambda-cyhalothrin, chlorpyrifos(ANSI,ISO,BSI), emamectin Benzoate in the early growing and reproduction period.