因为它们无法作为单株的植物存活。
应用单株选择的方法称为系统育种。
Application of individual plant selection method known as the system breeding.
讨论了单株选择对花粉育性的影响。
The effect of single plant selection on pollen fertility was discussed.
单株培养不产生卵孢子。
对于林木单株生长，以中度间伐效果最好。
Concerning the individual growth, the intermediate thinning has the best effect.
甜椒既不耐旱，也不耐涝，单株需水量并不太多。
Sweet pepper neither endures drought nor waterlog, not too much water need as well.
始花节位和采收始期与单株产量间存在一定的负向相关。
There was certain negative correlation between first flower node, initial harvesting date and single plant yield.
你也可以选择性地剪除枝叶，但是要先检查单株植物的必要性。
You can choose to prune your plants, but be sure to check the needs of your individual plant first.
结果表明，随外源钙浓度的升高，马铃薯单株块茎的数量减少。
The result showed that the number of potato tuber reduces significantly with the increasing of calcium concentration.
但单株籽粒蛋白质产量表现正向杂种优势，平均17.20%。
But the average heterosis of all hybrids in grain protein yield per plant was 17. 20%.
单株有效花球数对单株花产量的直接效应最大，其次为顶花球直径。
The direct effect of number of effective cones per plant was the strongest, followed by diameter of primary head.
不同品种、大小粒播种方式和施肥显著影响冬小麦分蘖和单株叶面积。
Treatments of variety, seed size and fertilization affect tillers and total green areas of wheat significantly.
百粒重与荚宽呈显著正相关，与单株荚数、单株粒数呈极显著负相关。
Hundred grain weight was significantly negative correlated with number of pods and seeds per plant.
本实验测定的指标是叶绿素含量、呼吸强度、蛋白质含量、单株产量等。
The indexes of this experiment are the content of chlorophyll, the breath intensity, the content of protein, grain weight per plant.
拟高粱春播单株最终DM产量较夏播的高，苏丹草和杂交狼尾草则反之。
On the contrary, sudangrass and pennisetum hybrid had higher final DM weight at summer sowing than at spring sowing.
株高对产量的影响主要是通过增加单株角果数和每角粒数而间接发生作用。
Plant height had indirect influence on yield per plant mainly increasing by siliquas per plant and seeds per siliqua.
分支数、根数与单株块根数、多块根根数、单株鲜产量是不易协同改良的性状。
The quantity of branches and toots are not easily modified coordinately with the quantity of root tubers, the quantity of multi-tuber root and the yield per plant.
利用模糊综合评判方法对广西17个龙眼品种(单株)加工果汁进行整体评价。
Fuzzy comprehensive evaluation method was used to evaluate the characters of longan juice in 17 Guangxi varieties.
改良模型中影响单株籽粒产量的各因素间，以单株面积和单株幼苗活力最为重要。
Among all the factors influencing individual plant yield, area per plant and time of emergence seem the most important.
在原模型中加入单株幼苗活力这个因素后，整个多元回归模型的可信度大为提高。
Results showed, that the accountability of the regression equation was greatly improved after this term was added to the model.
这个问题可能影响大范围内的果树，或者仅仅是单株果树，或者只是一株果树的一部分。
It can affect a large area or just individual trees or even part of a tree.
水稻小穗着粒密度是一个重要的农艺性状，其与单株穗数、小穗数和粒重等有密切的联系。
Spikelet density is an important trait related with panicle number, spikelet number and grain weight.
结果表明，保留密度的变化对树高生长影响不大，对林分胸径和单株材积的生长影响显著。
The results showed that the effect of the reserve density on the diameter and volume of individual tree were obvious.
以22个茎芥菜（茎瘤芥）品种（系）为试材，对6个性状与单株产量的关系进行通径分析。
The relationship between yield per plant and 6 different characters was analyzed by use of 22 tumorous stem mustard varieties.
高库容水稻株系抽穗期的单株根系活性高、单株根系总吸收面积和单株根系活跃吸收面积大。
Indica rice with large sink also had higher root activity per plant, larger root absorption or active absorption area.
林分和单株的树干、树枝、树皮生物量组成比例均随立地指数、造林密度的变化无明显的差异。
The ratios of stem, bark and branch biomass to total biomass of stand and individual tree are basically steady in different site index and planting density.
也可以根据防治实际中目标害虫的虫口密度及单株放蜂数量来确定每管的接入寄主数和种蜂数。
Sometimes, the amount of female wasps and hosts in single tube could be based on the density of target pests and the amount of female wasps released on one plant.
采用超薄聚丙烯酰胺平板凝胶等电聚焦电泳和单株后代法，分析了栗属种的PGI同工酶的遗传。
Inheritance of PGI isozymes in chestnut species was analyzed using isoelectric focusing on thin layer polyacrylamide slab gels and single tree progeny method.
结果显示欧报春群体含多种花色素，单株也可含有多种花色素，形成多变的粉色、红色及蓝色花。
The results show that there could be kinds of anthocyanins in colony or single primrose that forms various red, pink and blue colors of flowers.
结果表明，单株产量与果实性状的多元相关高于与营养品质性状的相关，也高于与早熟性状的相关。
It is shown that multiple correlation of yield per plant with fruit characters is higher than with nutrient quality characters, and with early maturity characters, too.
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